A college or university can address sexual harassment, sexual misconduct, any other related concern if it does not fall under Title IX. That is because the Title IX Final Rule has made a specific provision that allows as such. Since the Title IX Final Rule went into effect, almost all schools have taken that exact approach. In short, misconduct that was misconduct prior to the Title IX Final Rule going into effect will remain misconduct.
It's just that schools have created a two-part system where cases that would fall under Title IX would be addressed and adjudicated under the school's Title IX policies, and then misconduct that does not fall under Title IX sexual harassment, sexual misconduct that is, that does not fall under Title IX would be addressed under the school's newly created college or university sexual misconduct policy. If you're facing a Title IX concern or turn Title IX sexual misconduct case, having an experienced attorney-advisor in your corner from as early as possible in the process will always be for the best. They can help you navigate the process and will work towards trying to ensure a fair process and a favorable outcome.