How to create vlan on Forefront TMG

In our company we have a Forefront TMG server with 3 NIC.

Internal
Permiter
External

The internal adapter should need to get different IP adresses for each vlan 10.1.1.200, 10.2.1.200, 10.3.1.200. The internal card is an intel 82567LM and the drivers are installed. How can I create seperate nic's for each vlan on the internal adapter? And how I can route all this stuff?

Thanks in advance.