[akanevsky]

It is possible, although irrelevant to this hack.

FIND (includes/class_bbcode.php):

PHP Code:

    function handle_bbcode_code($code)
    {
        global $vbulletin, $vbphrase, $stylevar, $show; 


ADD UNDERNEATH:

PHP Code:

        // limit accessibility
        if (!is_member_of($vbulletin->userinfo, UG_ID1, UG_ID2 ... UG_IDN))
        {
            $code = 'You have no permission to see this.';
        }