Disable BPM for Invoice Approvals for Single User

Summary:

We have a user that would like to stop receiving invoice approval notifications via BPM (they have received over a thousand in a single day). Is there a way to disable the bell notifications for a single user.

Content (required):

We have a user that would like to stop receiving invoice approval notifications via bell notifications (they have received over a thousand in a single day). Is there a way to disable the bell notifications for a single user. We don't want to disable the notifications for all users. From reading on-line documentation it sounds as if this is possible, but I am not able to translate the documentation in order to make this happen.