[ubuntu] Ruing LXC/LXD containers in different networks

Hi,
I have a server with 16.04 up and ruing. I used lxd to create a container environment, where I bridged my network.
Everything is ruing smoothly.

Now I want to create different containers, which belong to 3 projects.
I would like to separate these projects, they should be ruing in 3 different networks, two containers in every subnet should have a loadbalancer and a jumhost, they should have two network interfaces, one facing to the projects inteal network, one facing the default network, that is the one my serveode is using.

How can this be archieved? Would I have to set up the project-inteal network manually or can I configure multiple networks with LXC / LXD?

Kind regards,