In almost all cases, the answer is no. You have one primary Natural Number, one region that is born active.  It begins to develop in the womb, is visible from birth, and stays with you until just after you die. We have seen a few cases in trauma situations with true multiple personality disorder where there is evidence of two Natural Numbers active within a person. But this is extraordinarily rare.
You can learn to activate all nine regions of the body – which is what we teach in our training programs, but this does not change or add Natural Numbers.