Private Blogs

Hi All

I am looking to complete my website but am at a huge stumbling here and not too sure how to move forward. Any direction will be most appreciated.

I am wanting to make a coaching site. So I am wanting to put forums where people can fill in information and this information will automatically be consolidated and sent to a page. This page needs to be private: only me and the person can see the information. And only me and the client can edit and comment and change information on this page.

The website is not a multi site ( I read somewhere that could help)

I can find a plugin for forums but then what? how do i get it transferred to the page? and how do i make private pages for each client?