Yes, in the same way that Mastodon and Lemmy federate at the moment. It's all using ActivityPub underneath, which is the protocol of the Fediverse essentially.

You can't follow individuals with Lemmy but you can see Mastodon user's comments on posts and Mastodon users will see your comments and posts on Mastodon with certain hashtags, I believe.

[–] JoBo@feddit.uk 2 points 7 months ago (1 children)

Mastodon is unusable if you follow Lemmy communities, so no one does.

But that wasn't my question. If a Lemmy instance I am on federates with Threads, how do I find people on Threads, follow them, and have their posts appear in my Lemmy feed? The people who are saying it can be done are not also explaining how it can be done. You seem to be saying, in a roundabout way, that it cannot be done?

[–] SorteKanin@feddit.dk 3 points 7 months ago

how do I find people on Threads, follow them, and have their posts appear in my Lemmy feed?

As I said, you cannot do this with Lemmy (at this time at least). Lemmy only supports following communities. Threads users will be able to post to communities and comment on posts and vote as well, and you can reply to them and they'll see your replies too. It federates in that way.