Dynamic Session Groups by Hostname

Please add the ability to create a dynamic Sub-Folder structure where you can use the computer's hostname.  

For example, our company puts the site code in the first part of the hostname. 123-KDHFBSI.  Where '123' is the site code.  So you would want to dynamically create a subfolder structure based on the SUBSTRING(HOSTNAME, 1.3).  That way you would then see folders containing computers that had the same first three characters or site code in my example.  

Currently, you have to manually build these groups one at a time using the static filter expression. (Name like '123*')