First of all as long as you are rendering the style the client has requested and they are happy, I don't see an issue.  Who pulled you over?  Are you an employee or booth renter?  Actually it really doesn't matter.  The point being, unless there was a complaint you should not have been pulled over.  There is a huge misconception in commission salons that the managers and owners are the know it alls.  It is their way or you are wrong.  Each of us have different techniques and different styles.  The bottom line of it all is customer satisfaction.  I will slap a set of clippers to any head if that is what is required for the desired look.  Gender is not an issue, my clippers don't know they are female. 

What you can do to stop this rude behavior is to sit down and establish boundries and limitations.  If I ask for help, then you have a right to interfere.  If I do not, mind your own business (saying it nicer is always better).  The bottom line is we all have been trained differently and have different styles.  Mine will most likely never mirror yours, so please do not try to mold me.  Good luck and hang in there.    

I agree with Doinitright.

Why would a salon institute such a ridiculous "rule"? Any salon that attempts to limit your creativity or learning curve is not the right salon to be working in. In all the years I've been in this business, that's by far the most bizarre "rule" I've heard yet.

I would ask for a darn good reason for the "we don't shave in this salon" spiel. How else is the stylist supposed to get rid of hair they don't want showing? These are mainly straggles of hair that are unsightly after certain cuts.

If you really want to remain at this salon, I agree that a little boundary setting is in order. Are you booth rental or commission? Either way, it's totally your choice which implements you use in order to achieve the style you are going for. If the client is happy, and the client requests it, that's all that matters.

I would quickly be putting the owner in her/his place regarding this issue (as Doinitright said, nicely). Later on it will be more difficult, especially if the owner falls into a comfortable complacency on how he/she thinks she can treat you.

"The truth is incontrovertible; malice may attack it, ignorance may deride it, but in the end, there it is."
Winston Churchill