title: PHP - Identifying Individual Users Under Same Router (main IP address)
body: <p>Is it possible to find the IP address of (or otherwise identify) each user on the same "router" or "main IP address"? </p>
  
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  <p>Update, clarifying question: </p>
  
  <p>Use-case: 
  I'd like to be able to track whether each of N individual computer users on a <em>possibly</em> common network has landed on a page. </p>
  
  <p>Currently, using other PHP IP detect snippets on S/O, this seems to only identify all N individual computers on the network as coming from the same IP address. This does not help solve the problem of identifying whether these come from different users on the same network, or if it's the same user on the network hitting the page several times. </p>
  
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