DNS forward WAN

[korbynn]

I am not sure if I am doing this right or if it can be done at all.
I have traffic coming in on the WAN.  I have 4 IP's Nat'd to internal DMZ.
I have added to the DNS forward the domain names which work from my LAN setup.
Can the DNS forward forward domains that are beening sent to one WAN IP to be distributed to several DMZ IPs.
If this is possible, could you please point me to the right direction.
Thanks
korbynn