Filter by groups

Right now I am not able to filter clients by groups in the client page of the dashboard. I want to be able to filter by groups I create so I can focus on only my clients that have particular needs. It would greatly help with organizing our clients into different buckets.

as an example group training clients or clients we have had an FC with but who haven't signed up for training. Just as two examples. If we want to have many many clients to manage effectively we need to be able to leverage groups throughout the apps features.