Dear Rohit
As per my understanding, you are looking for a solution for a issue which needs good "enforced" IT policy, user education on Pros and Cons, may be change in IT policy. Someone in your org is using corporate device(laptop) for installing an hotspot application for others which is outright wrong,
Or You create a another rate limited WLAN for those users which are restricted at this time and VLAN it to a network which is ISOLATED from corporate/production network. this is win win situation for users as they don't have to go & use WiFi via hotspots anymore which is IT managed/controlled This may require a change in IT policy too as not addressing this in long term is a real threat Corp wireless network and information security which these unmanaged hotspots bring to the plate
You can read this great post on this issue -
http://www.webtorials.com/content/201...
Hope this helps.
PS No feature in ZD which addresses this as per my knowledge.