Just like what you see at Home Depot or Lowes, get a pot big enough for you to put in a 18-24" wood or vinyl/metal trellis.

You can make one your self also with 2 sticks and some jute twine or other string. It would only need to be strong enough for a few months as well as whatever you deem to be manageable size.

If you have enough seeds, I would also suggest that you could plant some outside (in a pot or not). Let them grow from a natural condition of having spent the winter in seed dormancy. That way, come spring, you will still have more but you'll have come to it by 2 methods.

Passion fruit vines get absolutely monstrous. I have mine in a 3 gal pot on a 3 x 4 ft trellis and they outgrew it in a matter of months, overtaking a tree right next to it. I have to put it in the ground. With heavy pruning, I bet you could keep them to some reasonable size, but they'll constantly try to escape and wrap their tendrils around anything close. A vine in my neighborhood covers a 20ft fence and produced probably 100 fruit this season.