No.
This should not be an issue for agents who have one HMRC Account featuring many clients.
But an individual may only purchase one Ftax MTD package year within any Ftax Account. For example, if an individual has 2 VAT registered companies and a VAT registered self-employment, then they will need to purchase each within their own Ftax Account. Subsequent year forms may be purchased within the same Ftax Accounts.
In summary, only one HMRC User ID for an MTD account may be used within one Ftax Account.