Lemmy needs to have the ability to assign both local and federated communities to specific user-defined lists so we can control how we consume similar content in the Fediverse. For example, I might be a Reddit refugee that's fond of the /r/patientgamers subreddit. But now i have many multiple *patientgamers communities across various Lemmy instances, Kbin, etc... I'd like to be able to create a /l/patientgamers list, assign all of the local or federated communities I want to that list, and then navigate to that list to consume all of the "patientgamers" content from across the fediverse in one feed. Mastodon has this, and it rocks.