If you use the default Mail app on your Mac and you're running OS X Mountain Lion, you can add a sender to your VIP list just as easily as you can on your iPhone or iPad. VIP list basically will filter out emails you want based on who is sending them, therefore making finding messages a lot easier.
Don't know how to use VIP Inbox on your Mac? Here's how:
That's all there is to it. If you ever want to remove that person from your VIP list, you can just easily toggle it off the same way you turned it on.