(redirect
    (relay-ip '10.0.1.5')
    (dest-ip
        (select source-ip
            (when '192.168.200.17' '10.0.20.7')
            (when '192.168.200.34' '10.0.20.7')
            (when '192.168.200.41' '10.0.20.8')
            (else '10.0.20.9')
        )
    )
)
