I've been around PowerApps for a while, but experimenting with Portals as a way of letting our customers view their Support Ticket progress online.
As a basic example, I have a Table called 'Tickets', containing status, description and notes, along with a 'CustomerID' field. When a user logs in, they should only see the tickets associated with the CustomerID that they are linked to. There can be many users who are employees at same customer.
In other environments, I would have a 'Customer', 'UserList' and 'TicketUserLink' table. UserList would hold email and login details, and the Link table would allow us to link a group of users to a Customer.... Customers are then tagged to each ticket.
In Portals, after playing around the Web Roles and Permissions, I'm struggling to see the correct process of setting up something like the above.
Any help appreciated please.