I think what you are asking is member access to a CA MLS based upon the fact that you are a Realtor member in another MLS. Unfortunately, that is usually not an option.
There has been much discussion over the last few years about a national MLS member database. We are starting to see access across local MLSs to members in the same state. I am aware of that in FL and CA, but the access to other MLSs beyond the home membership MLS has been within the same state.
I am not familiar with any MLS that grants an out of state Realtor the same access they would for dues paying members. If anyone else s familiar with such, I would be interested to hear about it.
As a consumer, of course, you have access to the public side listing data through Realtor IDX sites, public MLS sites, Realtor.com, and of course, the properties listed in the Trulia database.
Of course, you can refer yourself as Jim suggested. Your Realtor status will help you by adding to your bottom line.
Good luck in your search.