I know others already answered you, but I just wanted to explain further. That's the main advantage of Lemmy: being federated. It means that each instance, even though they communicate with each other, is independent (they have their own rules, their own userbase, and are hosted in their own servers), which means that, even if one decides to ban people for using Tor, others wouldn't follow through. Dbzer0 wouldn't punish you for it though.