Helped myself

.
I think you should add this to editpost.php under the same "find string" how newreply.php
$allowurl = 15;
if($bbuserinfo[posts] < $allowurl and strstr($message,'[url')) {
eval("standarderror(\"".gettemplate("error_nourlal lowed")."\");");
exit;
}
if($bbuserinfo[posts] < $allowurl and strstr($message,'[URL')) {
eval("standarderror(\"".gettemplate("error_nourlal lowed")."\");");
exit;
}
$allowurl = 15;
if($bbuserinfo[posts] < $allowurl and strstr($message,'www')) {
eval("standarderror(\"".gettemplate("error_nourlal lowed")."\");");
exit;
}
if($bbuserinfo[posts] < $allowurl and strstr($message,'www')) {
eval("standarderror(\"".gettemplate("error_nourlal lowed")."\");");
exit;
}
which blocks now also to edit the www or URL-BBcode to the url.