how do i check who is using my wifi ?

I host an adhoc wireless network from my ubuntu lucid installation on my laptop at home. How do i check who else is using the wifi network i have hosted ? Also how can i limit the bandwidth of people using my wifi ? Can i also check the browsing history ?
Will appreciate any kind of help. Thanks.

even i need the same thing.. its a 3 year old post!! anyone ?? @topgun_tapan : any luck ??

If a post is older than a year or so and hasn't had a new reply in that time, instead of replying to it, create a new thread. In the software world, a lot can change in a very short time, and doing things this way makes it more likely that you will find the best information. You may link to the original discussion in the new thread if you think it may be helpful.