It doesn't do that only based on a keyword, almost all tools have different sources you can set apart from keywords, most of them do have the do this from a provided list, you can add people in that list and MP will follow, unfollow retweet and so on based on what it finds on those accounts, that actually exactly what you seem to ask for
sorry mate, but we provide the software you need to learn how to do facebook marketing yourself. BHW is a great place to start, it has a section dedicated to this and not all but some discussions will help, testing everything will also help. Facebook changes the rules very fast and what worked 3-6 months ago will probably get you banned today so you really need to know what you're doing with it, alternately you can try the other social platforms as they are more doable generally.