Comment on When you block someone on Lemmy, does it stop them from seeing your posts?
14th_cylon@lemmy.zip 2 days agoTouché, my bad.
The rest however still applies. What you are demanding is not possible and never will be (for good reason).
The only way you could achieve what you want is either with action of the mods, or by establishing your own community, where you can ban whomever you wish.