Someone may correct me if I'm wrong here:
I think the licence says that A SINGLE USER can't RUN Sonar on more than two machines AT THE TIME, and
two users can't use the same licence of Sonar on 2 computers,
I tried finding the EULA in X1 help .. it seems it's not there. I remember that you have to click those agreements above when installing Sonar. (I don'T feel like re-installing right now!! X1 is stable as it never been here ;)
HTH
V