Each WipeAway licence is tied to one Google account — specifically, whichever account you use when you sign in for the very first time after entering your key.
If you need to clean calendars across two Google accounts, run WipeAway separately for each one:
Our Small Business and Organisation licences are designed for exactly this — covering multiple Google accounts within a team or institution. If you need to clean calendars across a large number of accounts, contact us to discuss the right option for your situation.
Google Workspace admins can often clean multiple users' calendars from a single admin account, without needing a separate licence per user. See our Workspace & IT guides for more detail.