Conditional SNAT using an iRule on a Wildcard Forwarding VS

e.g.

 configuration

[root@ve11a:Active:In Sync] config  tmsh list ltm virtual fwd
ltm virtual fwd {
    destination 0.0.0.0:0
    mask any
    profiles {
        fastL4 { }
    }
    rules {
        qux
    }
    source 0.0.0.0/0
    translate-address disabled
    translate-port disabled
    vlans {
        v423
    }
    vlans-enabled
    vs-index 4
}
[root@ve11a:Active:In Sync] config  tmsh list ltm rule qux
ltm rule qux {
    when CLIENT_ACCEPTED {
  if { [class match -- [IP::local_addr] equals onCampus_networks] } {
    snat none
  } else {
    snatpool snat_pool
  }
}
when SERVER_CONNECTED {
  log local0. "Client [IP::client_addr]:[TCP::client_port] \
    SNATed to [IP::local_addr]:[TCP::local_port] \
    connecting to [IP::remote_addr]:[TCP::remote_port]"
}
}
[root@ve11a:Active:In Sync] config  tmsh list ltm data-group internal onCampus_networks
ltm data-group internal onCampus_networks {
    records {
        192.168.206.0/23 { }
    }
    type ip
}
[root@ve11a:Active:In Sync] config  tmsh list ltm snatpool snat_pool
ltm snatpool snat_pool {
    members {
        172.28.24.228
    }
}

 /var/log/ltm

[root@ve11a:Active:In Sync] config  tail -f /var/log/ltm
Nov 24 08:41:28 ve11a info tmm[14890]: Rule /Common/qux : Client 200.200.200.111:42810  SNATed to 172.28.24.228:42810  connecting to 8.8.8.8:8
Nov 24 08:41:38 ve11a info tmm[14890]: Rule /Common/qux : Client 200.200.200.111:43066  SNATed to 200.200.200.111:43066  connecting to 192.168.207.56:8