Is there a way to determine the number of active sessions created from a given client IP address?
Very nice example Balus C. We solved this problem by using an Observer Listener. Here is nice example/tutorial for the same.
http://www.big-oh.net/BigOhSoftwareWeb/content/tutorials/requestObserverListener.jsp
Just thought it will be helpful to other visitors. :)
Edit : *** April 2017 **
Looks like the http://www.big-oh.net/ site that contains the source above is dead. Here is the source from web.archive.org. Also the added the file referred webpage in github gist. Gist source and its html preview