iRule to apply Dynamic Bandwidth Controller Policy depending on Client subnet

You can use the example in this page to change your irule:

https://devcentral.f5.com/wiki/irules.ip__remote_addr.ashx

when CLIENT_ACCEPTED {
  if { [IP::addr [IP::remote_addr] equals 206.0.0.0 mask 255.0.0.0] } {
     pool clients_from_206
  } else {
     pool other_clients_pool
 }
}