The solution for this problem is very powerful and flexible if you want to give a certain group of user to have only an access to a section of your site.   It took me about 5 hours to look for the solution installing plug-in try it out tweaking it and then uninstalling it when it doesn’t do what I wanted to do.  I found a plug-in that will do just that for you.

Solution: User Access Manager by Alexander Schneider

With the “User Access Manager”-plug-in you can manage the access to your posts, pages and files. You only create a user group, put registered users to this and set up the rights for this group. From now on the post/page is only accessible and writable for the specified group. This plug-in is useful if you need a member area or a private section at your blog or you want that other people can write at your blog but not everywhere.

Feature list

• User groups
• Set seperate access for readers and editors
• Set access by user groups
• Set access by post categories
• User-defined post/page title (if no access)
• User-defined post/page text (if no access)
• Optional login form (if no access)
• User-defined comment text (if no access)
• Hide complete post/page
• Hide pages in navigation
• Redirecting users to other pages (if no access)
• Recursive locking of posts/pages
• Limited access to uploaded files
• Full integrated at the admin panel
• Multilanguage support
• Also proteced your rss feeds
• Give access by IP-address
• Plugin-Api to use the User Access Manager in your on plugins or extend other plugins

Included languages

• English
• German
• Czech, based on 1.1.1.2. Thanks to Jan
• French, based on 0.8.0.2. Thanks to macbidule
• Hungary, based on 1.0.2. Thanks to Zina
• Danish, based on 1.1.1.2. Thanks to GeorgWP
• Spanish, based on 1.1.2. Thanks to Juan Rodriguez

This plug-in is very useful and you can assign a group of user to access certain page or section.  This plug-in also works very well with Sidebar Login plug-in and Login with Ajax plug-in.