WDW resorts have recently begun printing individual names on room keys. If the reservation was made using points, "
DVC Member" will usually also be imprinted on the key - entitling that individual to some DVC benefits. Some benefits will also require the blue DVC membership card.
There will be one "account" for the room however, charging privileges can be decided for each card individually. At check out, each charge will be identified by the card used to make it, so charges may be totalled separately and paid by each individual if desired.
We usually allow charging privilege only on keys for our family when we bring guests with us. All venues that accept the room charge will also honor a credit card so it has never been a hardship for our guests.
Enjoy!