title: Is it possible for to hide a link of a website if it's visited from a user outside a network?
body: <p>It's hard to explain but we have this proposed system for a hospital and we are on the phase of coding it but the problem is we can't visualize it since the system needs to be internet-based. We have 3 modules which are the billing, employee management, and clinical system. Those 3 modules are obviously only accessible by the workers inside the hospital. But what we did was we linked those 3 modules in the website itself. So any user can see that link which they have no business on but they still see it. 
  How can avoid that?</p>