User Permissions

Hello

I would like to control witch users have access to change images in my gallery.
As far as I can see, the permission for editing posts is needed to do this – is that right?

My users who should have access to do this, should not have access to edit, create and publish posts – only change the images in the gallery.

Is there a way to control that a specific user role can use the plugin?

Hope it makes sense

Thanks