Ok, there's your instance, instance A, that hosts your personal account. There's the instance that hosts the community, instance B, and a random instance that your content has federated to, but doesn't host you or the community directly. This is instance C.
If an admin on A (instance A mods can't remove this post) removes your post, it gets removed on other instances too, including B and C.
If an admin or community mod on instance B removes your post, it gets removed on other instances too, including A and C.
However, if an admin on C removes your post (a moderator on C can't), then it is only removed on instance C. Instance A and B and any other instances the content has federated to aside from C, continue to see replies, edits, votes etc