Product variation access makes it impossible to restrict product management to owners

What is the meaning of a permission "create own <whatever>"?

Patch #33 works for me, but the 'Duplicate' option shows even if I don't assign the user with the permission to duplicate variations.

I would add some additional code to patch #33 to fix that detail.

It would be nice to have this functionality out of the box with Commerce Core module. I don't know how to install a patch so I will have this issue on my marketplace until is officially released.