Bound for can be used to talk about the future (as in Ashley's example) or direction. For example - The plane was bound for Europe when it crashed. I can't think of any examples of when you would say "round for".

It's hard to say without the context of using it in a sentence. You could say, "He was bound for greatness." As in, he was expected or fated to do great things.

Claro es que necesito saber si puedo usar bound for o round for en un contexto determinado o solamente una forma

Hola Jorge! No entiendo la pregunta. Puedes dar más contexto?