I don't know if this is the correct place to make this answer, but I would be pleased if you could help me out. I've been having problems wih Trados Freelance 2009 and/or 2007 to have at the same time two different licenses in the same compny network. Do you know how to solve this problem?
Just set the firewall
I.e. block the communication between both Trados machines.
If you have an intelligent admin, just tell him to define asymmetric VLANs on the managed switch if you have any.