LXD since 3.0 has support for Proxydevice (without NAT)
LXD since 3.3 has support for Proxydevice with NAT
As it took me some efforth to gather the info and finally make ProxyDevice with NAT work, I took some notes to ease it for next time, and thought they might be useful to others.
As I don’t have much time, I’ll leave a screenshot of the notes and a quick copy-paste.
(notes where taken with freeplane )