2 different sessions for same user

Is there any possible way how to allow for same user 2 sessions? I want to be able to connect and join different rooms in 2 separate browser windows or tabs for same user.

For logical point of view it should be possible, because I can be logged for example on Gtalk on 2 different computers, but im not sure if this can be done with openfire and XIFF library

thank you for your help

This is a server setting.

So if you’re using Openfire, take a look at this: http://community.igniterealtime.org/message/159315