How to select a set of nodes on a vector defined by N1, N2, N3 and basepoint?

If N1 is 100(node id)/ N2 is 101(node id)/ N3 is 102(node id).... Basepoint is 'userdefined', tolerance 0.1 / normal to plane

how to write a code to select a list of nodes falling on the defined vector?

Thanks in advance!