Blog Entry of 2008-Jul-25 in PRTG 7
Filtering Data when using Custom Packet Sniffing or Netflow Sensors of PRTG 7
In PRTG Network Monitor 7 when adding custom Netflow or Packet Sniffing sensors, you will notice a field entitled "Channel Definition". In this field you need to provide the channel definitions (one channel per entry) that allow you to account the monitored traffic in various ways.
This Knowledgebase article explains the details.