No
Any user who has the psk has the ability to decrypt all traffic encrypted with that AP using WPA2-PSK. The cipher keys are generated from that PSK all the attacker has to know is the psk and what functions the AP and Client use to generate the cipher keys, which he/she already has from previously associating themselves with access point. If the traffic has other layers, ssl for instance, well then that part of the traffic is "safe". However the Broadcast key (BES) might and should be changed whenever a client associates and also when they leave the LAN.