Will this work

I am using Untangle at home. I am looking for best prectices for Lan/user management. Basically I want to establish different subnets and route between the 2. I want to do this in order to create managment rules for different subnets. I am running Untangle on ESXI 5.5. I have 2 physical nics available and being used for Untangle. 1 NIC is WAN the Other is LAN. My current LAN is 192.168.2.0. I would like to have some computers be on say a 192.168.3.0. I want to manage each subnet differently. I am going to purchase the Policy manager app. I would like to have a dhcp server for each subnet. I am thinking I would need to add another physical nic.

Thoughts?