Assume a situation where a wireless access point is using WPA2-PSK, and it is configured to allow only a single client association at one time.
Client A connects to the access point with PSK and engages in some higher layer communication with hosts accessible on the AP's network.
Client B also has the PSK, but (presumably?) cannot associate with the access point while client A is associated.
Does the limitation of a allowing only one association to the access point at a time prevent client B from using his knowledge of the PSK to sniff client A's 4-way handshake and decrypt client A's traffic?
By sniffing the 4-way handshake, I mean employing the tactic described in in posts like these: