I would like to create a user that only can edit one article.

I'm creating a site with a business directory where the business can edit their own information from the font-end.

If it cant be done with core joomla, is there any component out there which can help me with this matter?

  1. Create a new group
  2. Assigned a user to this group
  3. Create new (or edit) an article.
  4. Click Set Permissions
  5. Select this group
  6. Set Allowed in Edit action

Read more at: How to create a user to only create or edit articles in one Category