[ASK] Facebook auth session...

[eluser]noobs[/eluser]
hello i am newbie use code igniter..i wan to build some application...user management...i want user management system...like facebook...if user access the application or login in just use 1 browser..if use another browser or computer...either login log off outomatic or destroy his session...any sugesstion for my problemm

sory for my bad engglish...hope all user understand to read it..