Lepton number violation is searched for at the LHC using same-sign leptons plus two jets from production and subsequent decay of heavy neutrinos. For Majorana neutrinos the expected value for the ratio R of same-sign to opposite sign lepton events is 1, while for Dirac neutrinos is 0. We point out that values that vary continuously between the two extremes are also a possibility. We focus on the case of an inverse see-saw in the Left-Right Symmetric Model and we also discuss how a measurements of R can be correlated with other observables such as Br(\mu\rightarrow e \gamma).