Let's say I have account A on site example.com that has a policy of strictly one account per real person. I then create a new Gmail address, use that Gmail address to open a new Chrome user (not incognito), then use that Chrome user and session to create a new account B on example.com.
I know that example.com can see that two accounts A and B are currently logged into the website from the same IP address. But can it know that it is the same person operating both accounts? For example can it track the ID of the browser (if there is such thing), or the ID of the computer / internet session?
Does it matter if I operate using desktop / laptop / smartphone?
To ask my question in another way, how is two people using two accounts on the same device different from one user using two accounts in the same device from the point of view of example.com?