Tell Tomato to Pass Traffic to a different firewall FIRST?

I have a Pfsense firewall acting as the Internet Gateway for my network. My network is also segregated into 2 VLANs (one Private, the other for Guests). I have 3 Tomato routers acting as dumb Wireless APs connected to the PFsense box via ethernet via trunk ports so both VLANS are passed to each router. I have 2 SSIDs, one attached to the main VLAN, the other in the guest VLAN (which is all configured the same way on the 3 Tomato APs).

My 2 VLANs are properly segregated, but I have a...

Tell Tomato to Pass Traffic to a different firewall FIRST?