Assign Different SNAT for different resource in same policy

Client wants to access two different portals, both the portals accessible with different source IP Through decision box it can be achieved, but the limitations are at a time only one portal can be accessible. For other portal again client wants to relogin through access policy as its having different SNAT settings..

 

The actual requirement is, within same login both portals should be accessible with different SNAT settings?

 

How can we achieve the same?