Allow OR filtering in + Criteria section of Setup Rules Actions in Rules Engine

We use the + Criteria section of the rules engine to allow a rule to run and then apply a different CTA to different segments within the Rule logic.  For example, I am trying to run a rule and apply a different CTA to Owner Manager A and B, while applying the normal CTA to everyone else.  The + Criteria allows me to enter one manager name but it fails to fire the CTA if I enter multiple manager names separated by commas.  Anyone have any ideas how to get around this, or does Gainsight offer OR capability?