General :: WiFi Tethering App With User Data Monitor

I have been looking for an application which is a more powerful version of the WiFi Tethering already included in a phone.

I have been looking for an application on Xda, Google, and the Marketplace but none I have found provides me with the ability to see individual users (or Mac addresses) data usage.

First a little background on what I am trying to achieve.I regularly provide a WiFi router for people with IPods and devices with wireless but no internet connection who need internet access to update games / browse the internet, and whilst my FUP at 500mb is quite low, I rarely use more than 20mb in a month so it doesn't bother me as beyond 500mb the connection is just limited to text and images (downloads and internet streaming are disabled after 500mb) which is all that I need.

However when my FUP has been exceeded alot of devices cant do the small updates this is no good when games or apps require it (as I have seen a couple even stop working till updates are completed) due to the connection being restricted. I have usually tracked it down to an over enthusiastic user who is watching videos on youtube, which has wiped out 100mb of my usage within 2 minutes on one occasion.

I am running both Android and Windows Mobile on my HD2, Whilst the built in "Portable Hotspot" of Android is good as it lets me restrict the number of users and see the Mac address of connected clients, it doesnt let me monitor their usage and then let me disconnect individual users them from the connection.Whilst im sure there is apps for overall phone usage I am looking to monitor the individual devices usage as with 3-5 devices it is hard to distinct between legitimate usage and constant heavy usage.

Is there any Wifi Tethering app to let me do this?

To summarize:

Wifi Tethering App
Android / Windows Mobile
Shows Client Usage
MAC filtering (or alternatives which allow individual devices to be disconnected)