use wpmu plugins on a different domain

Hello,

I am wondering if it is allowed to use the chat plugin I have from wpmu on another site.

Now its visible on http://www.danpajo.com . I also want to use it on kirheja.com but i am not sure if it is allowed.

If so that would be awesome because for the moment its only for a month.

if not. .. then its good i did ask it first.

thank you in advantage.

jap