Captcha only for guests

[marjan_gvg]

Someone help plzz 
I gave access to guests to post comments,but my gallery is spammed with porn bots.
I have read about adding Captcha mod,and i will do that,but i wanted to ask is it posible to modify something,so that only guests need to confirm with Captcha,but not the registered users.

Help plss
Thanks

[Tranz]

Yes, it's possible. When asking questions about mods, please keep the questions in the threads pertaining to the mod.