Can I make a smart collection of specific tagged faces? For example, I would like one collection for all photos that include facial tags of all three sons. I'm using the trial CC but I have many friends who love Lightroom. This feature was very important to me in Apple Photo and I hope Lightroom does the same but I can't figure out how. Thanks in advance!
Yes, you can indeed. Tagged faces show up as keywords, so your smark collection need only specify a keyword search that contains "all" of the listed keywords, which you would then enter.
See this video for more information on using the face recognition feature to organize and search your Lightroom catalog: