Hi ja-ich-halt,
As per the End User License Aggrement , you are allowed to use a single subscription on upto two machines only and not more than that . So if you meant to ask that " can you use two systems with your educational Creative Cloud subscription ", the answer to that would be a YES .
But you cannot purchase two Creative cloud subscription under the same Adobe Account .
Please let us know if that answer's your question ?
Regards,
Kartikay Sharma