A Network Monitor Expert which shows you the heavy talkers in a trace. This expert plugs into the Network Monitor UI so you run directly from the Expert menu.
Top User Experts enables you to analyze how much bandwidth machines connected to your computer are using. This can be useful if your network is clogged and you want to find the culprit. Of course, there are many other scenarios, such as when you have to know how much bandwidth a certain service requires.
Download Top Users Expert for network monitor from here