Private site for intranet users

[Gleb]

Hello,
I setup typo3 site for intranet. There are about 100 users. I need to allow each of them to have their own private site. Even not site but just private pages. The scenario like this:
user login, go to his site and does whatever hi wants there.

I know question is a bit uncertain. There are some ways to do this. Certainly someone already did it. I want your opinion on this.

Any suggestion would be much appreciated
Thank you in advanced