I was told by my part time restaurant employer of a year and a half that I could not work for him anymore because I also started working part time elsewhere for an employer that he does not like. He said I can work anywhere, but there.

Generally an employer may terminate you at any time without even having to provide a reason why, as long as you are terminated on a without cause basis such that you are paid your legal termination entitlements. This would not amount to grounds for just cause (i.e. termination without any pay). In any event, even if you were terminated without cause you are likely owed more that what has been offered to you (if anything). I recommend that you contact our office to schedule a consult with one of our paralegals or lawyers to review your matter further and determine any entitlements you may have.