I'm not saying it's a crime. I'm saying it's not your boss demanding you work only for them. If you do have that arrangement, it's because you signed a contrac

I'm not saying it's a crime. I'm saying it's not your boss demanding you work only for them. If you do have that arrangement, it's because you signed a contract to agree to those terms. The CEO that is the CEO of multiple companies (rare, but it definitely happens) signed a contract to agree to those terms, and is no doubt bound by other terms.