Are you staying onsite? If, so you will each need to go to the front desk and have your MB tied to your own CC.
If you are staying offsite, just using the MB for FPs and access to the parks, then no.
Yes, if you are onsite, first you must set up each band with it's own credit card. This can be done at the front desk of your resort. Also, tell the server to split the tickets. I tend to think that it's a bit of a pain, but they will do it. Then you can each pay your ticket individually.