One can always do award ticketing online for different last names. Of course it still involves a live agent when it comes to stop-over, open jar, or *A airlines.
Unfortunately, booking award tickets online only works for the simplest of itineraries, which is not the case for more complex needs such as open jaws and Star Alliance tickets. In this particular instance, my friend is flying to BKK, hanging around northern Thailand for about 10 days, then flying TG to TPE, where she will be staying for several weeks before flying NH and UA back to PDX.