How to disable access to a handfull sites using the content assistent?

Hello!

I want to restrict a users access using the content assistent of the Microsoft Internet Explorer 9. It works, but asks for each page accessed the first time for the content password. As pages may include advertisement, each of these pages need another password for admission. Also, if I admit the access to a page like www.cnn.com, say, I do not want to give admission for each new news page. Same for en.wiktionary.org: The user will access new words, each being another page. This seems to contradict to what I expect a content assistent should do: allow also the access to a site and its subpages.

But that is not my question. What I want to know is to restrict only a few pages, like www.facebook.com, www.facebook.de, or even www.facebook.*. Is this possible and, if yes, how?

Thank you for your help!