I assume the answer is no and if so maybe this should be in suggestions, but is it possible to use multiple SES accounts (as in, define a specific account for a specific brand?) It would be nice to be able to set up a specific high volume customer on their own SES account rather than impact the sending limit of other brands and have them default to my own account set up in the default settings.
My exact sentiments with @syntress2600. Not that my main intention is to make you buy more licenses, but if you are worried about your clients impacting your SES account, you should set up their own installation of Sendy.