Can I set logon as both user ID and user Alias in EP with ABAP data source.

Hi experts,

   My portal using back ABAP(SRM)  as user data source. I can realize user’s alias login by setting ‘LogonWithAlias' option to ‘true’ for the ‘BasicPasswordLoginModule’ as SAP help.

  But user ID login is invalid once alias login using.

  Can I set logon as user ID also user Alias, how to set?

  Thanks!

  Jesse