LXD 5.9 has been released

Yes, see Linux Containers - LXD - Has been moved to Canonical

Specifically Project views is the new feature.

See DNS not created for containers created in user projects - #20 by tomp for an example of such a setup.

Also see the video for the original network zones feature:

The lxc network list-leases command has also been updated to align with the automatic entries added to network zone project views. You can use the --project flag to alter the view for the list-leases command.