diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f1b865260..aa3a9692e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ You should also include the user name that made the change.
 - enhance(client): MFMのx3, x4が含まれていたらノートをたたむように
 
 ### Bugfixes
+- ユーザー検索ダイアログでローカルユーザーを絞って検索できない問題を修正
 - fix(client): MkHeader及びデッキのカラムでチャンネル一覧を選択したとき、最大5個までしか表示されない
 - 管理画面の広告を10個以上見えるように
 
diff --git a/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts b/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts
index 8b22f913d2..34827547b0 100644
--- a/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts
+++ b/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts
@@ -1,6 +1,7 @@
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
 import type { UsersRepository, FollowingsRepository } from '@/models/index.js';
+import type { Config } from '@/config.js';
 import type { User } from '@/models/entities/User.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
@@ -53,6 +54,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> {
 	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -62,79 +66,76 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private userEntityService: UserEntityService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const activeThreshold = new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)); // 30日
-
-			if (ps.host) {
-				const q = this.usersRepository.createQueryBuilder('user')
-					.where('user.isSuspended = FALSE')
-					.andWhere('user.host LIKE :host', { host: sqlLikeEscape(ps.host.toLowerCase()) + '%' });
-
+			const setUsernameAndHostQuery = (query = this.usersRepository.createQueryBuilder('user')) => {
 				if (ps.username) {
-					q.andWhere('user.usernameLower LIKE :username', { username: sqlLikeEscape(ps.username.toLowerCase()) + '%' });
+					query.andWhere('user.usernameLower LIKE :username', { username: sqlLikeEscape(ps.username.toLowerCase()) + '%' })
 				}
 
-				q.andWhere('user.updatedAt IS NOT NULL');
-				q.orderBy('user.updatedAt', 'DESC');
-
-				const users = await q.take(ps.limit).getMany();
-
-				return await this.userEntityService.packMany(users, me, { detail: ps.detail });
-			} else if (ps.username) {
-				let users: User[] = [];
-
-				if (me) {
-					const followingQuery = this.followingsRepository.createQueryBuilder('following')
-						.select('following.followeeId')
-						.where('following.followerId = :followerId', { followerId: me.id });
-
-					const query = this.usersRepository.createQueryBuilder('user')
-						.where(`user.id IN (${ followingQuery.getQuery() })`)
-						.andWhere('user.id != :meId', { meId: me.id })
-						.andWhere('user.isSuspended = FALSE')
-						.andWhere('user.usernameLower LIKE :username', { username: sqlLikeEscape(ps.username.toLowerCase()) + '%' })
-						.andWhere(new Brackets(qb => { qb
-							.where('user.updatedAt IS NULL')
-							.orWhere('user.updatedAt > :activeThreshold', { activeThreshold: activeThreshold });
-						}));
-
-					query.setParameters(followingQuery.getParameters());
-
-					users = await query
-						.orderBy('user.usernameLower', 'ASC')
-						.take(ps.limit)
-						.getMany();
-
-					if (users.length < ps.limit) {
-						const otherQuery = await this.usersRepository.createQueryBuilder('user')
-							.where(`user.id NOT IN (${ followingQuery.getQuery() })`)
-							.andWhere('user.id != :meId', { meId: me.id })
-							.andWhere('user.isSuspended = FALSE')
-							.andWhere('user.usernameLower LIKE :username', { username: sqlLikeEscape(ps.username.toLowerCase()) + '%' })
-							.andWhere('user.updatedAt IS NOT NULL');
-
-						otherQuery.setParameters(followingQuery.getParameters());
-
-						const otherUsers = await otherQuery
-							.orderBy('user.updatedAt', 'DESC')
-							.take(ps.limit - users.length)
-							.getMany();
-
-						users = users.concat(otherUsers);
+				if (ps.host) {
+					if (ps.host === this.config.hostname || ps.host === '.') {
+						query.andWhere('user.host IS NULL');
+					} else {
+						query.andWhere('user.host LIKE :host', {
+							host: sqlLikeEscape(ps.host.toLowerCase()) + '%'
+						});
 					}
-				} else {
-					users = await this.usersRepository.createQueryBuilder('user')
-						.where('user.isSuspended = FALSE')
-						.andWhere('user.usernameLower LIKE :username', { username: sqlLikeEscape(ps.username.toLowerCase()) + '%' })
-						.andWhere('user.updatedAt IS NOT NULL')
+				}
+
+				return query;
+			};
+
+			const activeThreshold = new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)); // 30日
+
+			let users: User[] = [];
+
+			if (me) {
+				const followingQuery = this.followingsRepository.createQueryBuilder('following')
+					.select('following.followeeId')
+					.where('following.followerId = :followerId', { followerId: me.id });
+
+				const query = setUsernameAndHostQuery()
+					.andWhere(`user.id IN (${ followingQuery.getQuery() })`)
+					.andWhere('user.id != :meId', { meId: me.id })
+					.andWhere('user.isSuspended = FALSE')
+					.andWhere(new Brackets(qb => { qb
+						.where('user.updatedAt IS NULL')
+						.orWhere('user.updatedAt > :activeThreshold', { activeThreshold: activeThreshold });
+					}));
+
+				query.setParameters(followingQuery.getParameters());
+
+				users = await query
+					.orderBy('user.usernameLower', 'ASC')
+					.take(ps.limit)
+					.getMany();
+
+				if (users.length < ps.limit) {
+					const otherQuery = setUsernameAndHostQuery()
+						.andWhere(`user.id NOT IN (${ followingQuery.getQuery() })`)
+						.andWhere('user.isSuspended = FALSE')
+						.andWhere('user.updatedAt IS NOT NULL');
+
+					otherQuery.setParameters(followingQuery.getParameters());
+
+					const otherUsers = await otherQuery
 						.orderBy('user.updatedAt', 'DESC')
 						.take(ps.limit - users.length)
 						.getMany();
-				}
 
-				return await this.userEntityService.packMany(users, me, { detail: !!ps.detail });
+					users = users.concat(otherUsers);
+				}
+			} else {
+				const query = setUsernameAndHostQuery()
+					.andWhere('user.isSuspended = FALSE')
+					.andWhere('user.updatedAt IS NOT NULL');
+
+				users = await query
+					.orderBy('user.updatedAt', 'DESC')
+					.take(ps.limit - users.length)
+					.getMany();
 			}
 
-			return [];
+			return await this.userEntityService.packMany(users, me, { detail: !!ps.detail });
 		});
 	}
 }
diff --git a/packages/frontend/src/components/MkInput.vue b/packages/frontend/src/components/MkInput.vue
index 0f99bf9aad..3e3d7354c1 100644
--- a/packages/frontend/src/components/MkInput.vue
+++ b/packages/frontend/src/components/MkInput.vue
@@ -23,7 +23,7 @@
 			@input="onInput"
 		>
 		<datalist v-if="datalist" :id="id">
-			<option v-for="data in datalist" :value="data"/>
+			<option v-for="data in datalist" :key="data" :value="data"/>
 		</datalist>
 		<div ref="suffixEl" class="suffix"><slot name="suffix"></slot></div>
 	</div>
diff --git a/packages/frontend/src/components/MkUserSelectDialog.vue b/packages/frontend/src/components/MkUserSelectDialog.vue
index 981ae56e6c..4ce8c08512 100644
--- a/packages/frontend/src/components/MkUserSelectDialog.vue
+++ b/packages/frontend/src/components/MkUserSelectDialog.vue
@@ -16,7 +16,7 @@
 					<template #label>{{ i18n.ts.username }}</template>
 					<template #prefix>@</template>
 				</MkInput>
-				<MkInput v-model="host" @update:model-value="search">
+				<MkInput v-model="host" @update:model-value="search" :datalist="[hostname]">
 					<template #label>{{ i18n.ts.host }}</template>
 					<template #prefix>@</template>
 				</MkInput>
@@ -61,6 +61,7 @@ import * as os from '@/os';
 import { defaultStore } from '@/store';
 import { i18n } from '@/i18n';
 import { $i } from '@/account';
+import { hostname } from '@/config';
 
 const emit = defineEmits<{
 	(ev: 'ok', selected: misskey.entities.UserDetailed): void;
@@ -115,7 +116,7 @@ onMounted(() => {
 	os.api('users/show', {
 		userIds: defaultStore.state.recentlyUsedUsers,
 	}).then(users => {
-		if (props.includeSelf) {
+		if (props.includeSelf && users.find(x => $i ? x.id === $i.id : true) == null) {
 			recentUsers = [$i, ...users];
 		} else {
 			recentUsers = users;