If your license server is on the network, that effectively rules out installing a locked license on the laptop, since that would involve reconfiguring one of your floating licenses to a locked license, thereby removing one of the floating licenses from the pool...possibly angering coworkers when they can't get into ProE due to no available licenses.
VPN is an alternative, but depending on your current setup, may not be feasible. VPN will get a network license easily, but if your data must be checked in/out for data control (PDM) reasons, I doubt that you will want to wait while entire assemblies, parts and drawings are downloaded to a laptop just to make a few changes (then you have to upload everything when finished). Any VPN solution has to be COMPLETELY supported by your IT department, otherwise you will not be given enough access to VPN in the first place (whether you VPN using a modem or via internet).
If either of these solutions are not feasible, you should just wait until you are in the office to do your ProE work or have the company purchase a locked license specifically for you and your laptop.
Recneps