acb on Nostr: npub120zh3…p33r2 Any chance of having posts which are only visible to mutual ...

npub120zh308gs69j3vwgvvrzgglv58vsk3q0vef43uajyu0lc3mtldsq2p33r2 (npub120z…33r2) Any chance of having posts which are only visible to mutual follows? (Or even better, LiveJournal/Google Circles-style lists)