You can create a smart album that collects photos of a specific person in a couple of ways.
Step 1. On the Faces corkboard, select someone’s tile.
Step 2. Click the Create button and press the Option key, then choose Smart Album from the pop-up menu.
Other ways. You can also create a smart album for a person by simply dragging that person’s tile over to the Library area. And you can include a Face criterion when building a smart album. Set up the pop-ups in the smart albums dialog to read Face is name of person.
To create a smart album that gathers photos in which two people appear together, select both of their corkboard tiles (click one, then Shift-click the other), then Option-click the Create button and ...