This would all depend on the license purchased in the first place. It has to be specifically a multi-user license to allow multiple accounts otherwise if it's a multi-machine license then the same account is used for all. I suspect that it's the latter type of license.
You can clarify that with a simple phone call to Customer Service:
Telephone Customer Service
To speak with a Customer Service representative, call 866-622-3911. You may be asked for your registered email address and order number. Telephone charges may apply.
Average contact length: 10 minutes
Estimated wait time: 5-10 minutes
Hours of Operation: Available daily, 6am-6pm Pacific
We have no access to your account from these forums so best to call them. It's toll-free.