DESTINATION NAT LAN TO LAN

[touriste]

Hi,

I amworking on projet and I need to do a double NAT:
A PAT to change the source
A DNAT to change the destination from network to another network

SOURCE---------------DESTINATION------SOURCE------------------DESTINATION
192.168.100.0/24-----10.31.31.0/24-------10.31.0.1/32 (PAT)--------10.1.1.0/24

If the PAT is easy to create, I don't see how to realize the DNAT LAN TO LAN.

Someone has already made that with pfsense ?

Thanks.