I have read your post.
The McAfee Browser protection is a basic site-advisor feature. This feature is available in the basic McAfee Total Protection Service. The browser protection service will only show the sites that are good and which have the possibility of infecting your computer when you visit that webpage.
The McAfee Web Filtering service is available in the McAfee Total Protection Service advanced package. In the web filtering service the customer gets the option to block sites based on categories.
For e.g. If the customer blocks access to social networking sites as a whole, then no user can access any social networking sites like Twitter, Facebook, Orkut and similar sites. There are a lot of categories this way.
A single site from the blocked category can also be allowed using the exception option.
For e.g. If the customer has blocked the Social and networking category, he can allow only the face book site by add the face book URL to the exception list.
This Web filtering feature is available only in the McAfee Total Protection Advanced package.