I have an idea and i just want to know if its possible

if the web proxy is an intermediary between the client and the requested url, could that url be sent to two different clients by the web proxy in response?
so in stead of this

[client]<-->[proxy]<-->[website]

it would be this

[client1]<-->[proxy]<-->[website]
.................. /
...........[client2]

meaning if [client1] requests "java-forums.org" on the proxy server
the proxy server will request "java-forums.org" and send it back to [client1] as well as [client2]

it would just be url sharing between two people, like a real time delicious