how to show what groups a given reference is in?

Can you explain in further detail how you would do this? When I go into “Create Smart Group” I’m unable to pick references in a specific group to add into them. I need to add other criteria (Figure 1.jpg).

Based on this post, I’ve uploaded screenshots of how we add labels at the moment (Figure 2). 

BUT does anyone know how this can be done automatically? For example, I have an “Anesthesia” group. 

I search online, find an article and right-click “Add to Anesthesia Group”

Can the Custom label then be applied automatically? I’ve attached an example of this problem in Figure 3