recently I wanted to use a lan messenger via wubi at work. The problem was that all the rest of the computers connected to the lan network are windows ones and the program that were using was softros.
I found some messengers for linux like iptux, yet I was able to find out that it is not possible to communicate with another messenger like softros (I gave it a shot). This does not mean that iptux might not work while using both windows and ubuntu boxes connected to the same lan, yet this time all use the same lan messenger.
Then, I installed wine while using wubi. I do not think that using wine under an ordinary ubuntu desktop installation will have a difference. Finally, I installed softros under wine and it worked, provided that the version installed was compatible with the version of the main server. Even different versions of the same program might not cooperate with each other.
Hope this helps,