It's important for you to meet with your advisor to confirm how/if the course(s) you want to take online from another campus will count toward your degree.
The "Equivalency Finder" (http://equivalency.northcarolina.edu) may help you locate courses at other UNC system campuses that have been approved for transferring to a selected course at your home campus. Course equivalencies may change over time or differ by degree program. You should always consult with your advisor about specific course equivalencies and degree requirements.