It can be done, but it will require an understanding of creating mySQL database tables and queries to be successful.
you would need to create a new table to hold the content for the user.
the table would need to have a ContentUserID column. In the ContentUserID column store the ID value from the Users.UserID column of the users table for the specific user the content should be displayed for.
when a user logs in, a session variable is set that contains their ID named:
you can create a recordset using the $_SESSION['UserID'] variable to filter the ContentUserID column to return the content specific to the logged in user.