Here is a complete tutorial on how to run GUI Apps in an LXD container,
=>
https://blog.simos.info/how-to-run-g...buntu-desktop/
There is both graphics acceleration and sound support (Pulseaudio).
You can also create a shortcut on your desktop, that when you click it, it will run the app from the LXD container.
This tutorial expands on the previous one about running Wine, by making it more general and allowing any program to run.
If you find something that does not run, please tell me!
For stability purposes, I have been testing this with Steam games for way too long.