caching, proxying, and specific requirements..

[JR Mayberry]

Don't know if squid or Proxypass has the ability to do what I'm looking
for, but maybe someone can provide guidance..

Say (for example) we have a page called /customer/reports/PHILADELPHIA,
which has a list of things on it, one authenticated user can see X
number of things of the total list, another user can see the whole
list.... 

Is it possible to, basically cache a page on a per user basis...