What does rodriguez mean when he uses the phrase "two names, two worlds"? what two worlds does his name represent?

I'm guessing he's talking about the good and the bad sides of this world we live on.
Like Heaven and Hell the basic good and bad 

Why? 
Think of a person whose killing people (which is bad) but to protect his loved ones (which is good)

We all have different names from different perspectives 

In the real world your name could be 
John Johnson

In your world or better known online your name could be
Alan Norman

Hope this helps

Pardon me. to answer questions like this, we would have needed more information. for starters, two sentences from the excerpt that came with the question.