If they don't want to use ClearML, why not just run  docker run ...  from the command line? Does he want to use the queueing system without using a clearml task?
ReassuredTiger98  if this user passes to the task as docker args the following,  it might work:
'-e CLEARML_AGENT_SKIP_PYTHON_ENV_INSTALL=1'
Exactly. I don't want people to circumvent the queue 🙂