The low-pressure high-current wire discharge has been numerically studied. The computation is performed when particle-in-cell Monte Carlo (PIC-MC) simulation attains the steady state after the sheaths formation and the hollow-cathode discharge regime is instituted. The role played by different groups of electrons is analysed via the Monte Carlo collision technique using the PIC-MC field distribution called—a posteriori Monte Carlo (APMC). It is shown that the major contribution to the discharge current is due to thermalized electrons, while fast electrons maintain the discharge via the pendulum effect, typical for hollow cathode discharges.