Vista - Virtual Machine Manager and licenses

Hello,

My question looks quite simple: I am studying different virtualization
solutions, with this particular need in mind: I want to limit each VM
to only one instance at a time, in order not to have more users than
licenses for software installed in one of those VM.

Does Virtual Machine Manager permit this ? Is there a way to set a
quota of user per VM ?

Thank you in advance for any helpful answer.