It's unclear what you're asking for. What do you want to happen here?
You have the option of putting whatever you want in the network configuration for either port. If the ports are on different subnets, then they will naturally have different gateways.
http://www.symantec.com/docs/HOWTO92383
The only thing to be aware of is if you give them IP addresses on the same subnet, as it goes a bit funny on you then:
http://www.symantec.com/docs/TECH171607