It depends on the arrangement between the Introducing Broker and the underlying broker. Some Introducing Broker even actively manages their clients' account(s). Some can get access to your account information including your trades in order for them to calculate the commission accurately. For the specifics, it's best that you ask the Introducing Broker itself to find out exactly what they can get access to.
You could look into brokers who don’t charge any account maintenance fees, that should work for you.