Sharepoint list lookup column with filtered condition

Hello,

I have the same problem as the website below.

http://howididit-sharepoint.blogspot.com/2012/04/filtering-lookup-columns.html

I want effects that allows one list having a column connected to another list, but the drop down list should meets some conditions. So, does anyone have any solutions?  I try the solution in upside website, but the problem still be unsolved.

Hope someone to provide some detailed solutions.

Thanks a lot.