我不知道你为什么pre_get_posts 因为这是正确使用的挂钩。例如，如果我们想限制edit.php 当当前用户是作者时，屏幕仅显示作者的帖子，我们可以说：

/**
 * Pre Get Posts
 * Restrictions by Role
 * 
 * @return void
 */
function wpse378774_pgp( $query ) {
    
    // Return Early - Not Admin Panel
    if( ! is_admin() ) {
        return;
        
    // Return Early - Not Main Query
    } else if( ! $query->is_main_query() ) {
        return;
    }
    
    $user = wp_get_current_user();
    
    // Return Early - User not an author
    if( ! in_array( \'author\', (array)$user->roles ) ) {
        return;
    }
    
    // Limit all queries to only show posts by author
    if( $query->is_main_query() ) {
        
        // Get all user IDs who are authors
        $user_query = new WP_User_Query( array(
            \'role\'      => \'author\',
            \'fields\'    => \'ID\',
        ) );
        $user_ids = $user_query->get_results();
        
        // Set our query modifier
        $query->set( \'author__in\', $user_ids );
        
    }
    
}
add_action( \'pre_get_posts\', \'wpse378774_pgp\' );