Not necessarily. In or out of position is absolute, not relative. So if you're multi-way you can be out of position (you're not last to act) but just call a cbet (if the person who cbet was out of position on you). Heads up, though, the answer would be yes.
I guess you will probably have seen the Tutorial: Custom Reports and Statistics, but that has a section on making new versions of existing stats which shows you how to make a copy and add criteria to the expressions.