Several subnets into a single interface.

[Itg]

Guys, need to make a single LAN network card, plugged into a switch 3com, IP delivery for different grinding machines that may connect to the network, for example:

Computers on the internal network, get the IP subnet 192.168.0.0/24
Computers visitors entering the network, get the IP subnet 192.168.1.0/24

Is there any way to do this? It would be a MAC address?

This works beautifully in another proxy that the client had was a Linux Ubuntu, he had an eth0-1 / eth0-2 / eth0-3, Linux was sending the IP address according to the MAC table, that the same eth0, he could perceive only the virtual interface eth0 (192.168.0.0/24 = 1, 2 - 192.168.1.0/24, 3 - 192.168.2.0/24)

The pfSense is virtualized, I tried using two NICs connected to the same vm_network, each virtual NIC with DHCP, put each IP address tied to the mac due, but sometimes the machines come in a network, sometimes on another network, I need a solution urgent for a client.

I appreciate everyone's help!

[Itg]

Did I solve this with the new version of pfSense to RC3?
Because I'm using the previous version, I downloaded at the beginning of last year.