How to disable OSD notifications for specific email addresses?
While this solution does not work with configurations for OSD notifications, you can deal with your issue within the filters you've setup on Thunderbird.
Since the email notifications presented by OSD refer to unread messages, you can add to your filter the option Mark as Read.
This will prevent those messages from being presented by the OSD notification, thus solving your initial issue.
try this add on
https://addons.mozilla.org/en-US/thunderbird/addon/filtaquilla
you can suppress notifications using filters