Moving this from the other thread because it is a more appropriate location.
Fixer,
Thank you.
Is it possible for two people to post from different computers simultaneously (or nearly so) and still show the same IP address?
Yes. Example:
User 1: Computer 1: Connected to network 1
User 2: Computer 2: Connected to network 1
User 3: Computer 3: Connected to network 2
User 4: Computer 4: Connected to network 3
Four different computers, 4 different users, but users 1 & 2 will have identical IP addresses if they post at the same time (or, any other time for that matter). Users 3 & 4 should never have the same IPs unless they log into different computers on the same network.