Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
On a different matter, I was in the local Apple store today, so while there, I asked my question (above). The short answer is that Internet Accounts, in themselves, are independent of other devices on the same network.
 
On a different matter, I was in the local Apple store today, so while there, I asked my question (above). The short answer is that Internet Accounts, in themselves, are independent of other devices on the same network.

Yes. In home environments each Mac stands alone, and the configured accounts would have no effects on each other.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.