正在查看current_user_can()\'s文档，我看到它使用WP_User::has_cap(). 因此，如果您的代码（或WP核心代码）使用current_user_can( \'edit_post\', $post->ID ) 要确定当前用户是否可以编辑当前帖子，可以使用user_has_cap 过滤器（调入WP_User::has_cap()):

add_filter( \'user_has_cap\', \'wpse360937_allow_manager\', 10, 4 );
function wpse360937_allow_manager( $allcaps, $caps, $args, $user ) {
    // Bail out if we\'re not asking about a post:
    if ( \'edit_post\' != $args[0] ) {
        return $allcaps;
    }
    // Bail out for users who can already edit others posts:
    if ( $allcaps[\'edit_others_posts\'] ) {
        return $allcaps;
    }
    // Bail out if the user is the post author:
    if ( $args[1] == $post->post_author ) {
        return $allcaps;
    }
    $post_id = $args[2]; 
    $manager_id = get_post_meta( $post_id, \'manager\', true );
    // Assumes the meta field is called "manager" 
    // and contains the User ID of the manager.
    if ( $manager_id == $user->ID ) {
        $allcaps[ $caps[0] ] = true;
    }
    return $allcaps;
}