It could be industry-driven for external recruiters (obviously not relevant for internal recruiters), but quite often is oriented by skillset: creatives, IT, finance, etc. In some large organizations, they might specialize even further, such as within IT, software engineers vs infrastructure. And...
skills, and criteria that I establish, such as where the position will be based. If you tell me that you automatically reject applicants based upon the factors you listed, then you are of no value to me, and I will find someone willing to work for the fee I pay them...