Given the following XML:
Max
Jen
&l
You can combine multiple selectors, but your syntax isn't exactly correct:
$(xml).find("user[state='CA'],[state='NV']")
This finds all
$(xml).find("user[state=CA][sex=m],user[state=NV][sex=m]")
If you don't want to repeat yourself:
$(xml).find("user").filter("[state='CA'],[state='NV']").filter("[sex='m']");