Right, "persona management" is a technique for keeping track of simulated people with simulated interests, simulated aging (so the accounts can exist for years and be reputable), simulated interests and consistent simulated schedules, and simulated vocabulary.
"Persona management" software allows centers of contractors to maintain the identities of these people in a rotating fashion, with the software helping the contractor to choose the right accents and vocabulary, etc.
The biggest use I've seen it in is in politics, specifically events of national security importance.