
The question is: is it possible to add custom prop only to the selected objects and not to add it as a template for the all object of the same type (i.e. when selected one object property editor shows one properties, and when another - another properties).
If it's not possible, can you add such feature, I think it's not very hard because when I copy-paste objects with own custom properties from one scene to another, the custom prop doesn't duplicate.