Deviceanduser "auto log off"

the login logout feature works very well but i have one problem / request.

lets say user 2000 is logged in on device 1000.

later the same user (2000) logs in on device 1001.
(without log out from device 1000)

if someone calls user 2000, two devices will ring (1000 and 1001).

i would like that only the last login device is ringing (device 1001 only).

how can i achieve that?

hope you can help

daniel from kaula lumpur