ToddW is correct, this is stored under .lastlogin in the $HOME (users home dir), and only keeps the last record.
You could try and make this work differently, but it’s too much trouble when you have the cpsrvd access logs available anyway.
A way around is: I have created my own proxy, based on the idea of using a proxy to access cpanel when behind a firewall (cpanelproxy) and have virtual hosts which have their own logfiles (like my main domain, etc…).
And you can also set up extra security measures since you can run this from your own home dir…
Peter, that 127.0.0.1 appears whenever you access CPanel from SSL.