Currently, we can only filter contacts by their Tags if they enter a Workflow using the Contact Created/Updated Triggers and it can only filter contacts that
have
a tag. It would be nice, in case we're trying to filter contacts who are tagged "lead/prospect" and not "client" to be able to filter those contacts out using the Filters section on any Trigger.
If it's too difficult to get it to work on all triggers, it would at least be nice to have "Does Not Have Tag" added to Contact Create/Updated and both "Has Tag" and "Does Not Have Tag" added to the Tag Added trigger.