my company hosts websites as a value added service for our existing customers. we currently have one customer that would like to host about 3-4 additional websites from their existing server. they would also like to be able to bill the different departments accordingly for their bandwidth usage. i currently am using mrtg to monitor this clients bandwidth usage, but that only tells me how much bandwidth they are using overall. i need to be able to break this total bandwidth usage down to the specific sites hosted on their server. i was wondering if anyone else has run across this situation and what app(s) they may suggest.