Extension:PrivatePageProtection

The PrivatePageProtection extension implements a way to restrict access to specific pages using a parser function. Using that parser function, the user groups that should have access to the page can be listed directly in the page.

Usage
To restrict access to a page, add this text to the top of the article you want to restrict access to:

would restrict access to the sysop group.

restricts access to members of the autoconfirmed and emailconfirmed groups.