When you write a new Post or Page (or maybe a Custom Post Type) this plugin make Private Visibility choosen by default.
Designate categories as "members-only" via 'Privacy Settings.' Assign them to users via 'Profile.'
This plugin allows you to require users to log-in to see specific pages.
Change the background colors of the post/page within the admin based on the current status : Draft, Pending, Published, Future, Private.
Whisper Comment Reloaded is a WordPress plugin for commenters to control comment visibility for other viewers.
Keep your site private with dark-site. Simple to use.
Protect parts of posts from unauthorized users. Requires User Access Manager.
Making private category (with login-logout)
Adds option in the admin panel for making your blog (including rss feeds and uploaded files) private.
Shows the desired content only for the desired country. Widget also included.
Hides private details from comment notification emails, such as IP address and email.
Protect your BuddyPress Installation from strangers. Only registered users will be allowed to view the installation.
Makes a blog private for a time period. Allows and dissallows registering for each blog in WP Multiple Blogs or wpmu.
Manage easily, who is allowed to access your blog or certain parts of your blog or just improve the security of your installation
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