is nat to (egress) possible ?

[Илья Шипицин]

I'm running multi-homed firewal.
at every single moment only one interface belongs to "egress" group.

is it possible to do something like that

match out from 192.168.0.0/16 to ! 192.168.0.0/16 nat-to (egress)

?

Cheers,
Ilya Shipitsin