All ezManage users in the same brand attached to the same store(s) can see each other’s customers. If an ezManage user can see a store’s orders, they can also see all the customers who have ordered from that store.
In the Activity Timeline of a customer, ezManage users will see orders from stores they have access to. If a customer has ordered from another store in the brand that the user doesn't have access to, they won’t see that order in the Activity Timeline.
Brand Admins (or anyone attached to all stores) can see all customers across all stores. This may include corporate contacts.