Thanks a lot for your answer Vladimir.
Yes, he is able to see the private post on the front end, using the url but I would like that he is able to see the private post on the backend as well, but not edit it.
So, I could that he use the private post as template creating a duplicate (post) on which he could edite and so on.
In the backend, he can’t see the private post, he is able to see it only if I assign edit_private_posts but I don’t like it
Could you give me some suggestion about my issue?
Thanks a lot
Mario