ipchains and -y

Would someone be willing to explain the -y flag in ipchains for me?
Maybe an example of when/why it would be used?

I want to allow telnet to a outside (internet) server only
when the connection is initiated by a certain internal (192.168.2.x)
ip.

Mike
mgcon@getnet.com
http://www.getnet.com/~mgcon
Phoenix, AZ
USA