Have you tried blocking by vendor. like what Console admin says here
class id is divide in 6 part if you can choose it till vendor then all device which are related to hp printer that is accessible and if you selected till model then same model printer is accessible, in your case you can choose till model because your sevice serial number getting change but other detail not because that is fixed by vendor
below is the syntx and example
<class>\<type>&<vendor>&<model>&<revision>\<serial number>
<class>\<type><vendor><model><revision>\<serial number>
Example
SanDisk Micro Cruzer - USBSTOR\DISK&VEN_SANDISK&PROD_CRUZER_MICRO&REV_2033\0002071406&0
Choose
SanDisk Micro Cruzer - USBSTOR\DISK&VEN_SANDISK&PROD_CRUZER_MICRO*
Link for guidance
http://www.symantec.com/business/support/index?pag...
https://www-secure.symantec.com/connect/forums/application-and-device-control-device-id-changes-when-connected-another-computer