要记录批准评论的主持人，请执行以下操作：

function wpse_comment_moderator_log( $comment ) {
    global $current_user;
    get_currentuserinfo();

    update_comment_meta( $comment->comment_ID, \'approved_by\', $current_user->user_login );
}
add_action( \'comment_unapproved_to_approved\', \'wpse_comment_moderator_log\' );

function wpse_display_moderator( $comment_text, $comment ) {
    $approved_by = get_comment_meta( $comment->comment_ID, \'approved_by\', true );
    if ( $approved_by ) {
        $comment_text .= " - Approved by $approved_by";
    }
    return $comment_text;
}
add_filter( \'comment_text\', \'wpse_display_moderator\', 99, 2 );