Maybe I'm incorrect but unless you make a different user log in and associate it with a different wallet, how would the mining software know that my laptop01 is not your laptop01?
You can have multiple workers under the same user name on the pool if you have the same wallet, but I don't see how else it would be possible as the config file has no reference to your wallet id.
The pool is a little different from most pools. Worker ids are unique. So, if you created a worker id "worker1", nobody else could have a worker named "worker1", thus just by using that worker name it's possible to link a mining rig to your account.