$user = BOL_UserService::getInstance()->findUserById( $userId );
$userRegIp = long2ip($user->joinIp);

$userActIp = ip2long(OW::getRequest()->getRemoteAddress());

public function getIp(){
    if (!empty($_SERVER['HTTP_CLIENT_IP']))
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
        $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    else
        $ip = $_SERVER['REMOTE_ADDR'];

    return $ip;
}