Caching without views?

[eluser]Sarfaraz Momin[/eluser]
well one problem which is still bothering me is that if I enable caching will the user info change dynamically for all the users if they login on all the pages. The issue I might face is that once the page is cached the same content will be visible to all the users irrespective of which user is watching it. The method that you explained about using a single view for the complete site would be gr8 but can it give me some more flexibility of caching of the stuff i want it to cache.