Legal Question about Federal Jobs in California while being a patient in Colorado

Okay so heres the skinny,
I currently live in Colorado, but have been planning on moving to California. I have been applying for several Federal Jobs in California (Dept. of navy, etc.) and I am concerned that my name being in the Colorado Medical Marijuana Registry will cause problems with Federal employment (Specifically a "secret" level clearance which is required) in California. I still haven't received my Registry Card. (I'm probably about 7 months out since they are so backed up)

If someone could point me in the right direction that would be great, thanks.

Is it possible that you would test positive for THC/cannabinoids given a UA or hair test? If so, why subject yourself to the application process and get caught in a lie? You know they're going to test.