We've been thinking about this one a lot recently.
A few use cases:
You have two groups of users: free and paid. You can segment to only show feedback from your paid users.
You are a marketplace with buyers and sellers. You can segment to only show feedback from sellers.
You want to focus on your most loyal customers. You can segment to only show feedback from customers who signed up more than a year ago.
We'd love to hear if you'd like this feature and how you would use it.