The visibility option appears when you create a new post registration page:

Another way that I have successfully restricted page visibility by registration type is to use registration paths. For example, I had an event that had two registration paths - one for customers who were paying to attend the event and one for sales partners who did not have to pay a registration fee. I was able to customize additional pages within the registration process for each registration path so that customers could see a set of information specifically for them, while sales partners could see a different set of information just for them.
Hope this helps!
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Jess Olcott
Training Program Coordinator
ETC, Inc.
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