LXD 3.0.3 network configuration expert needed

I'm looking for an expert who can help me to setup the proper network configuration for access to and from the Internet of an LXD container in a routed setup. The routed setup is important, because for use in the containers I have an IPv4/29 subnet routed to the physical network interface of my host. Since the use of a bridge will expose the containers MAC address to the physical interface, my ISP does not allow this configuration for security reasons. Please carefully read [login to view URL] and make sure you fully understand what's written in the sections "Use with virtualization per routed method" and "Use with virtualization per bridged method". In my case the latter is NOT ALLOWED and the ISP will block the hosts main address in case of MAC address issues. I'm currently using the latest stable Ubuntu 18.04 with Netplan on the host and the containers. LXD is version 3.0.3. The versions mentioned here are required (e.g. dont tell me to remove Netplan; dont bid in case you dont know Netplan or modern LXD Network configuration good enough). LXD is already in place with one running container setup using the default profile for natted access to the Internet. So far it works well. I want you to create a second container configured for direct access to and from the Internet using an IPv4 address from the subnet. Any setup of routing, bridges or whatever is part of your job. IPv4 forwarding is already enabled. For now only IPv4 is required. IPv6 networking will be implemented in a later project.