Probably the best way to answer this question is with a counterexample to humans: the nematode worm C. elegans has 302 neurons. Every individual has exactly that number, and each is found in the same place with the same function in every individual. This is one of the things that makes C. elegans an attractive model organism for study.
Humans definitely do not develop the same way. There are certainly groups of neurons that are found in every individual, and many of the tracts have at least a typical anatomical course that can be found from individual to individual, but it's not as if you can arrange each of the tens of billions of neurons in a list and find the same "Neuron #10,934,035,587" in two different people.
The most successful prosthetic operation that interfaces with the neuromuscular system these days is through myoelectric control, where rather than using electrical activity from neurons, one uses electrical activity in muscles, such as muscles in the chest and shoulder to control a prosthetic arm or hand.