I attach a tag on one of my device, and when submit job I will add "tags:" to my job, it's ok.

But, when others submit their job with same device-type which same as my device, as they did not specify "tags", they will have chance to run their job on my device.

How to avoid it? I want the job not be scheduled to the device which have a tag if the job did not specify any tag.

I tried to set the device as private, but then only me can use this device, I have other guys in groupA which want to use the device, while I hae another some guys in groupB which didid not want to use these devices as some modules on the device is not same.