Working in multiple virtual environments

[tpuk0]

Hello!
I am trying to understand how (if possible) to completely separate between two virtual envs. With python I can just create venv2, activate it and start installing packages from scratch. With pdm I switch to venv2 pdm use --venv venv2, but then if I cannot install packages from scratch with pdm add ... as it will install everything from project.toml and will modify it. I am aware that I can install from another .lock file but still don't see how to create a new .lock file from scratch.
Thanks for any help