Not directly. The Users list (Marketing > Users) has no membership-plan column or filter — its search box only matches the columns shown (ID, name, role, email, phone, status, etc.) — and the Membership Plans page does not show a member count. To check a single customer, open their profile and look at the Membership Plan dropdown. For a list of all customers on a plan, export your customers or ask Sprwt support for a data pull.