Re: Can a daemon like unbound run in two RDOMAINs at the same time?

Can it run in two different rdomain(4)s? Yes, but not "natively". You'll
have to run separate copies of it for each rdomain(4). If you don't need
to actually run it in different rdomain(4)s but instead only need it
accessible, then pf(4) is your friend. Something like below should work:

pass out quick on lo1 inet6 proto { tcp udp } from ::1 to ::1 port 53 rtable 0
pass out quick on lo1 inet proto { tcp udp } from 127.0.0.1 to 127.0.0.1 port 53 rtable 0
pass in quick on { lo0 lo1 }