Can one cookie be shared by multiple users logged on to the same device?

Question

I\'m trying to set up a web application so that it handles permissions based on the device being used to open the application. For example, any users who logged on to Device A c

Answer 1

Cookies are set on a per-user basis only. If they were not, it would have been a major security breach.

Therefore, the answer to the question "Can one cookie be shared..." is NO.