Hello.

      Is there any way to make that some user is not able to edit image(s) or folder data made (uploaded) by another user(s), but to have privileges to upload images to same folder and to edit just images which own?

     There is field "owner" for every image, and I noticed that one user (except master) can not delete image owned by another user, but it is still able edit title, description, custom data and other fields, to rename or copy file to another place...

So practically one user can edit info of images uploaded by other user. Correct me if I am wrong?

I played around with user groups, and privileges, but I can not make this efficient.

      Also I searched on forum and I saw that there is multiple similar posts, and that this was one of wished features during last few years of development.

I saw there have been a lot of improvement with user rights but still I can not make that.

To make it clear, for example.

If master give upload right to multiple users to upload to some folder, I wish to make that any of those users can upload images to that folder and to be able to see its content so that they can be able to add more info for image,
title, description, custom data and other fields, but not to be able to add or change any info for objects (images) owned by another users.

Is it possible?

Recommended read if you haven't: http://www.zenphoto.org/news/an-overview-of-zenphoto-users#zenphoto_users

Access rights are not applied to individual images, only to albums. If a user has rights to edit an album he may edit any image within that album.