Ink Member plugin provides you the option to protect your content and sell them to the audience once you get paid.
Makes your site content visible only for several users who are in your trusted list.
Social Privacy is a set of open-source plugins for WordPress that restrict the read access of posts or categories to only specified registered users.
Automatically adds extra security to download file links.
Author :A. Roy / A. Mahmud
Restrict access only to specific IP address. Other visitors will see a message. The article is hidden from feed as well.