Traffic Usage from Specific subnet

there are two ideas coming to my mind when reading your question. the first one is to use stats profile.

 

 

Custom Reporting with iRules by Joe

 

http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=66

 

 

the other one is a tricky one (don't laugh please :p). i think we may create 3 pools with exact same member. then use irule to send traffic to pool based on source subnet.

 

 

hope this helps.