Trigger emails from a list of senders

Is there any way to configure automations or publications such that a workspace can be triggered via email from one of several senders? Both publications and automations can filter by email subject, and the Filter action in automations can then filter emails based on one sender, but there appears to be no way to filter based on a list of senders ("from either Person A or Person B"). Is this in fact the case?

Details, if they help: we'd like to enable a certain work group of five people to be able to trigger a specific workspace via email. While they can and will also use a specific subject line, I'd like to be able to ensure that no one outside the work group can trigger that same workspace even if they know the "key" subject line.

Is there a way to achieve this, short of using five separate Filter actions per automation? Which appears work, but isn't very elegant, and will get hard to maintain as/if a given work group develops more workspaces. It also doesn't allow us to get any feedback if a non-approved address sends a trigger email, because 4/5 of those filters are going to fail regardless.