  The Standard Model gauge symmetry is extended by $U(1)_{B-L}$ which when
spontaneously broken leads to residual $\mathbb{Z}_4$ symmetry. $U(1)_{B-L}$
gauge symmetry made anomaly free by introducing exotic SM singlets with
corresponding $U(1)_{B-L}$ charges of $13$, $-14$, and $15$. $\mathbb{Z}_4$
symmetry ensures the Dirac nature of neutrinos, simultaneously stabilizing dark
matter. Dirac neutrino mass is generated through scotogenic scenario. Dark
matter, direct detection, cosmological constraints, and collider constraints
analysis is performed. $\mathbb{Z}_4$ symmetry predicts the exact absence of
neutrinoless double beta decay ($0\nu 2\beta$) and gives a prediction for an
enhanced neutrinoless quadruple beta decay ($0\nu 4\beta$) via which this model
can be tested. Model allows for Majorana dark matter as well as for long-lived
dark matter candidates.
