use a login variable in group home directory and directory access

Is it possible to use a system variable like $LoginID in a Group's Home Directory and Directory Access settings?  I was thinking to create a generic group to span multiple users that would help define the path for all home directories for users who are members of the group.  I tried using the $LoginID found on System Variables In Serv-U.  The result was when the user signed into the FTP server the home directory with the directory name $LoginID was created instead of the actual loginId of the user.  So, my attempts to see if it works didn't pan out with much success.  If it matters this is a group and user created in the "Database Groups" and "Database Users" on an Ftp domain.  This is Serv-U FTP 15.1.0 on Linux.

Thank you,

Mark