I have this question in mind about how many filmmakers, writers and actors are represented by these people. However, it seems that only applies inside the North American industry except for a few examples who represent from other countries. I wonder if they have a representation for those who are overseas only in terms of contracts, business and sales.
Are you asking if Agents represent people currently located in countries outside of their own? A creative will acquire a roster of Talent Agents, Managers, Representatives, etc with their bases covered Domestically or Internationally.
Talent Scouts will put out feelers to different Talent Agencies in other countries if they're looking for talent from that specific country.
Everyone remembers the discovery of Christoph Waltz - He was just a low-key indie film / television actor with Players.de before Tarantino came along. CAA runs his life outside of Europe now.