Installation of the Post Access Controller is pretty standard.
- Download the zip archive of the plugin
- Extract the archive
- Upload that archive to the /wp-content/plugins/post-access-controller/ folder
- Go to the Plugins menu in the admin of your WP site
- Click Activate in the Post Access Controller line
- Go to the Settings -> Post Access Controller page to get a few things setup and configured.
- Done! You're ready to start editing or creating posts with all the access control you need.