I have had a few camiallias growing for a few years now but this year a "round ball" appeared after the bloom died.
Is this a seed pod? If so how do I get it to grow??
The only way that I knew of to propagate camiallias was to start off of cuttings!

I guess the only way is to dry the seeds and then come spring, try to grow from them. Good luck!!!

Camelia seed in your zone 6 --- You could plant them now in pots and keep the seedlings as a houseplant for the winter or save until Spring to plant.
The seedling will not come "true to mother plant", but will be a cross between the 'mother' and the 'father' polinator.... The large seed pod usually has 2 to 4 seed inside that have hard shells. You will have to crack or pierce the hard shell on the seed before planting. Good luck.

This is a good time to plant Camellia seeds.  The hard shell is similar to Mac nut seeds so you could use a vice to carefully open them up with out damaging the seed but I've also used a sheetrock knife to shave the outer shell until there is a tiny opening to the inner-chamber, then plant.  If you are going to store the seeds you need to keep them refrigerated or they will lose viability.

Have fun!