Legal Question in Civil Litigation in Missouri

Your posting doesn't supply enough information to fully answer your question. Generally, one may forbid someone from entering it coming onto private property, that they own or control. But, privat citizens and companies generally have no authority to forbid a person from using public roadways, sidewalks or land. It isn't clear why your employer would forbid you from coming to work.

You should consult directly with a civil practice attorney in your area.

Good luck