Owel

Please help. I just want to know if i can configure my lancard with two ip address without any conflict to each other address.. We have a lan and an internet connection and a server used as a domain on our lan.. If the network address of our lan is 192.168.0.0 and the network address of our internet is 192.168.2.0, how can i connect to our lan without disconnecting the internet connection? can i have an internet connection and the same time connected to our lan on just one lancard?