Thanks for your reply, Adam.
In any portal, I can only add users from the default portal, so in this sense, yes, it does work the same as the default portal. However, the expected behaviour is that I can add the live support functionality to any portal and I will be able to add users only from that portal. Is this not the case?
I have found a couple of other users with the same issue and it appears to remain outstanding/unanswered.
http://cutesoft.net/forums/thread/26179.aspxAny advice on this would be much appreciated
John.