By default, the Joomla User Group Author has editing access only to articles in which they are the Author. As a result, it is very simple to restrict front end article editing to specific articles by assigning a Joomla Author user to the article.

For example, say you have a user who needs to have editing access to a specific article, but you don’t want that person to be able to edit any other articles.

For details on how to give a Joomla User front end editing permisson to a specific article, click here.