The voucher is owned by an account, so the reservation needs to be made from that account.
Assuming you buy from me, I would make the reservation and then put the your name as the guest's name. As long as your name is on the reservation, then you would be able to check in, regardless of the account.
If you are looking to get credit in your account for the stay, for example, that wouldnt work in this case.
Thanks.