Safe Search in IAM and/or NGAF

Most of us encounter a client that require to block porn images when searching in google or other search engine. Specially in education industry. As for now, our IAM can block it using keyword but it blocks all if you just type the keyword. But what if we include the word "sex" in keyword group object? It also blocks all results, but in some school they dont want to block some results because they also using it for some research or learning studies. In short, they dont want to block all keywords result but just filter its result. They wanted the same function of "safesearch" of google chrome in our appliance so that it can filter all search results for the adult category. Can we do that in our IAM and NGAF?

Thanks and regards!