Currently, but relay code can implement solutions for this too. nostr:nprofile1qqsw9n8heusyq0el9f99tveg7r0rhcu9tznatuekxt764m78ymqu36cpz4mhxue69uhkvun9deejuat50phjummwv5hsz8rhwden5te0wfjkccte9e3xjarrda5kuurpwf4jucm0d5hsz9thwden5te0wfjkccte9e6hg7r09ehkuef0avzrjf does work on filtering at the relay level, I'm sure he can implement something for relay runners to use.