The person has two options (1) come to California and complete the approved in person DUI classes (AB541 or greater), or (2) move to another state and waive your "privilege" to drive in California. So long as you live in California, Calfiornia DMV will never accept completion of an alcohol class from another state. The in-person class must be taken in California even if the court accepted an out-of-state or online program in satisfaction of probation. (Note: DMV requirements and the Court probation conditions are separate.)
If you move out-of-state, you can call DMV Mandatory Actions Unit in Sacramento, California, at (916) 657-6525 and ask for a "1650 waiver packet." They will only mail this packet to the licensee at an out-of-state address (you will also have to prove you live out-of-state with a utility bill or such). This waiver allows out-of-state licensees to drive in California, but does not allow the out-of-state licensee to acquire a California license within 3 years of filing the waiver. One can only qualify for the 1650 waiver once in a lifetime according to DMV information. The 1650 Waiver removes the California hold, assuming an SR22 is also on file with DMV.
If you come back to California within 3-years and want your license back, you will have to take the applicable in state California DUI class.
The above process is required only if you are convicted in Court for VC23152 or 23153, if you are not convicted in Court of one of these code sections but still sustained an administrative suspension due to having a .08 or higher breath or blood test, under 21 zero tolerance, or refusal, you may not need to get a 1650 waiver but will still be required to file an SR22, ride out the administrative suspension and pay the reissue fees.