AirWave maintains past rogue client associations only if that client has a valid association to a managed AP (within the retention period). This past association would show up on the client monitoring page for that client. The rogue ap detail page only shows the current rogue client associations that are seen.
The details for these rogue client associations is maintained in 2 database tables: rogue_client and rogue_client_historical. Rogue client table keeps the current rogue client sessions. Rogue client historical keeps the past associations.
Ways to get to that data via CLI:
# dbc 'select id, mac, ssid, first_heard, last_heard, rogue_ap_id, bssid, ap_id from rogue_client;'
# dbc 'select id, mac, channel, ssid, first_heard, last_heard, rogue_ap_id, bssid, from rogue_client_historical;'
It'd be a feature request to enhance this functionality. Feature requests can be made through the ideas portal on the support website.