Don't think you can install the same license on two machines... seem to recall they get locked to the unit once registered. Or maybe it was your PSN account. Forget the details.

If each console has a copy installed though (like, for another player), you may be able to sign in as a guest on your account though like we can on the PC version. Not sure though... PSN accounts come into play with the console versions, so it gets a bit funky.