This plugin allow to manage user roles with post types very effectively.You can restrict your visitor/users to access any post type as well as an individual post type like single post, page, attachment etc.
This section describes how to install the plugin and get it working.
- Upload plugin to the
/wp-content/plugins/
directory
- Activate the plugin through the 'Plugins' menu in WordPress
- After activation the plugin you guys can find in Menu with the name 'My Rules'.