Euh have you tried or statements?

I'm fairly new at mirc myself but you can try this
Quote:

if ($nick !isop # || $2 != $null || $2 isalnum ) { return }


if that doesn't work, try
Quote:

if (($nick !isop #) || ($2 != $null) || ($2 isalnum)) { return }

and if that doesn't work, well im all out of ideas. :P