Depending on your device you might be able to have multiple user identification policies (i think).
In which case this might work.
Create 2 different policies with 2 different nats.
the first policy have a user group with the guys who want to use the 1 line
the second policy have user group with guys who want to use 2nd line
Use PBR to route the traffic down each line based on the 2 different source IP's
From a doc i just saw, the order of operations seems to think SNAT happens before the final routing decision..
Not sure if this will work, but worth a look
I know on most fortigates you cant use 2 policies for user ident, but i think you can on certain models
In which case this might work.
Create 2 different policies with 2 different nats.
the first policy have a user group with the guys who want to use the 1 line
the second policy have user group with guys who want to use 2nd line
Use PBR to route the traffic down each line based on the 2 different source IP's
From a doc i just saw, the order of operations seems to think SNAT happens before the final routing decision..
Not sure if this will work, but worth a look
I know on most fortigates you cant use 2 policies for user ident, but i think you can on certain models