Choose specific QR or barcode for an alarm

I was trying to create an alarm for days when I go to work where I would scan a barcode in the bathroom and then a separate alarm for days when I work from home where I would scan a barcode downstairs (so hopefully I wouldn’t get straight back in bed afterwards). Am I correct in thinking that for each alarm you either scan any or all of the codes and you cannot choose a specific code for a specific alarm?