selectseries3 variable problem

hi ,

i am trying to link the workspace/users to folders inside of users forlder. eg  workspace/users/bob..... workspace/users/bill ect.

does anyone know the variable to set so it picks up the current logged on users name? so on microstation start up it doesnt have a list of all the different users but just one (that logged on user) 

_USTN_USER = $(_USTN_WORKSPACEROOT)users/ .....

is the varibale (_ENGINENAME)?

thanks in advance