Select Members of Group 30

Selects all of the channels that are members of group 30. Once you get to 30 groups you may have some other workflow issues. I tend to keep the Group Inspector open in a separate window when I have more than 7 groups assigned. I try to name them so they make some sense.

Overview of groups in Logic Pro — Apple Support

You can have a maximum of 64 groups. A channel strip can also be a member of multiple groups.