I am trying to install it now, I don't want to do anything illegal, but Stardock has not been greedy in the past (by allowing multiplayer), I just hope that is the case here.  They are one of the more generous companies so all I can do is try and hope.

I thought I read in a FAQ somewhere on Stardocks page that they allow you to install the game on multiply computers, but you can only use one computer for THAT buy at the time. But if you want to move to another computer, turn off the game and continue from there.

This was sometime ago I read this, when Stardock still got a Shop on there site. So I hope I remember right.