Route Traffic between multiple pools based on Client IPs and XFF(same as Client IPs).

 Can you verify if requests is actually coming till 3rd statement? Also if you have only this iRule on the Virtual Server then you can define Pool - Fedration-ACC as a default pool on the VS. So it will get match at the end. So if any of the iRule statement is not matching e.g. first two statements, traffic will be forwarded to the default pool.