Will NAL Availability/Distribution Rules Registry Rule handle a Multi-string RegKey

The Application Object has Availability/Distribution Rules Registry Rule with only String and DWord values for configuration. Does this mean I am not able to create an availability rule for a Multi-string value?

I wanted to create a rule for HKLM\HARDWARE\SYSTEM\Description\SystemBiosVersion which is a Multi-string value to deliver a application object to certain hardware models.

Can it be done? If not any otehr registry entries that I could use as a machine model identifier?

Many thanks,

Mike