Complete Pass-Through?

[twoblink]

I posted this question before but I don't see the post, so I guess I'll repost again..


Can I do a complete pass-through from the inside to outside for one box only?

Diagram below:

Internet --> DSL Router --> wl500gdeluxe --> Computers A,B,C

Computers:

A) Wifi DHCP'ed Laptop
B) Windoze box static IP
C) A DSL based Internet TV box that has a "real" static IP. like 220.135.2.x

I need to firewall and regulate A and B, but let C pass through as if it's not connected to the router but just a switch.

Can I just set box C as the DMZ box, does that allow it to skip the NATting and Firewalling?

Thanks.