Note: (getvar "loginname") will return the users loginname - so you don't need multiple statements (there is no such thing as loginname1, loginname2, etc.)
In other words, when KRISB fires up, it will look for KRISB-STARTUP.lsp, and if found, load it.
The same applies for AMANDAT, or CURTN, or GRANTA, etc.
So you only need the code I posted.