Can I specify more than one user per folder?

In a business environment, many users may need or be responsible for the documents, often the boss often does not check these documents and his employee needs to manage and make the hard work

In this case can I assign more than one user to a category? example:

The owner of the folder is LION but who uses the folder is CAT, in this case the owner of the folder would be LION and the user with access to the folder would be CAT, but LION has a new employee. DOG, so he needs CAT and DOG to work together! In this case the owner of the folder is LION, but who can access the folder is LION the CAT and LION himself for being the true owner.

It is possible? I saw that you can specify folders for specific users but I was doubtful about that.