When I was using Linux I used to use Linux namespaces:
https://man7.org/linux/man-pages/man7/namespaces.7.html
Also on FreeBSD, there are jails:
https://www.freebsd.org/cgi/man.cgi?jail
I was wondering what the alternative was on macOS 12? I'm new to Macs so I'm just trying to learn the system and any features it might have.