No, for every SciNote domain you need a dedicated account.
While you can use the same email address as your username (and even the same password, though a general internet good practice is to have a unique password for each of your accounts), you cannot merge the data from one SciNote domain (e.g. your data on your free account at my.scinote.net) with the data at another SciNote domain (e.g. your company's premium SciNote domain).
Separate instances are available with our Premium plans. If you have any additional questions, please, do not hesitate to contact us at firstname.lastname@example.org. For more information about the Premium plans, please request a quote.