Like it works for offering, the segregation of knowledge article, at least the internal ones, should propose articles linked with the requestor. Like his organisation, location or business unit or his role.
In our example, we manage HR requests of company members. This company is actually many companies. There are differents answers (so differents articles) according to the company you belong to. For the operator, see all articles induces error risk, which could be severe in this domain.