Price Lists/Modifiers

In our system we have put all businesses into the same operating group.  The problem now is that when users go and set up/modify price lists/modifiers they can inadvertently change something that effects other customers pretty easily.

Is there a way to limit or segregate the data so that someone for example doesn't go in and create a modifier that is not qualified to a particular customer and ends up affecting all invoices?  We have retrobilling turned on, so when this happens it generates a bunch of retrobills globally which is not good.  We then have to figure out who changed what and change it back so we can negate the retrobills.