Looking at Project Calico and found this: Calico for LXC and LXD
This repository is a rework of the CuiZhicheng/calico-for-lxc repository in order to facilitate the development of a Calico CNI Plugin that works with LXD by the use of the current (i.e. November 2018) CNI and Calico versions.
See Scenario #3 for LXD and #2 for LXC
Project Calico is described as open source and whose purpose is to simplify, scale, and secure cloud networking