In the right context, "not under the control of anyone" and "not subject to anyone" can mean the same.
(I'm curious that you didn't make an effort to get more responses.
Do you expect people to go through the whole of the play to locate the sentence containing the phrase question in order to help you ?!)
No, I have no time to test anyone here. I am here to get my problems solved. period. Your first answer, not under the control of anyone, is a good one that I can use for some situations in the future. Thanks anyway.