Referencing UserID in Logon Constraint Rule

When a user enters their User id and password on the Admin login page and presses Save. What is the field name for the UserId field?

I'm trying to reference the userID field from the LoginConstraintRule but I'm having no luck. I've tried thinks like accountId, accounts[Lighthouse].accountId...

There's a sample Logon Constraint Rule that references remoteAddr. What other fields are available to the Logon Constraint Rule?

[446 byte] By [Danoh62] at [2007-11-14]