can't add remote computer name to advanced firewall rule properties---remote computers tab

[TekTips5551212]

I have 2 computers: Windows 8.1 Pro 32-bit and Windows Vista Business SP2 32-bit. Both computers are in the same workgroup and both can see each other in explorer---Network.

Both have TeamViewer 9 installed.

I am trying to lock down the Windows 8 (desktop) so only the Windows Vista (laptop) has access to Team Viewer through the firewall---advanced settings---inbound rules.

When selecting properties for one of the rules, I first bullet “Allow the connection if it is secure”.

I then go to the remote computers tab and check “only allow connections from these computers”.

I then click Add.

Clicking Object types shows "Built in security principles" and "Groups".

Clicking Locations shows the name of the local (Windows 8) PC and nothing else.

I expected to see the name of the Vista PC in Locations but do not.
How do I get the Vista PC added here in the Remote Computers tab?

Can you please advise?

Thanks.