Hi,
I use m0n0wall with three interfces :

Public IP - m0n0 - (NAT) 192.168.0.12/24 - LAN
               |
              DMZ
        212.X.X.193/28

I use "advanced outbound NAT" with this rules:
192.168.0.0/24, dest *, target *

and it works fine. Nat is ok on the LAN -> WAN
DMZ is public range and is also ok, but there is no LAN -> DMZ NAT: when 
i'm connected to one of the DMZ, i keep my private IP 192.168.0.76

So I try this "advanced outbound NAT" rules:
192.168.0.0/24, dest 212.x.x.192/28, target 212.x.x.193
192.168.0.0/24, dest !212.x.x.192/28, target *

but it dos not work, LAN is not natted to DMZ, i keep my private IP 
192.168.0.76 when connected to 212.x.x.194 !!

How is it possible to nat LAN to DMZ ??