Can Hawaiian players be added to s California roster ??

YES ... California's "bordering states" are Arizona, Hawaii, Nevada and Oregon ...

So what are Hawaii bordering states? Also how does that rule apply to Canada teams?

Hawaii's "bordering states" are California, Oregon and Washington ... The complete list of bordering United States (+ Guam) and Canadian Provinces appears on pages 82-83 of the Official SSUSA Rulebook ... The Canadian bordering province rules are also described in Rulebook §13.1(3)D.4 on page 65 ... The SSUSA Rulebook is available electronically on this website and from the SSUSA office for a hard copy at a nominal fee to cover shipping ... Many answers to questions you are asking are readily available therein ... Good luck ...