SharePoint list has permission down to the list level, but what if we need to control view, edit and display for each column? I have been researching on a lot of add-ons around the Internet and luckily found one that works just brilliantly. There’s this add-on called SPListDisplaySetting, hosted on CodePlex, which allows you to do that. Strange thing is the first time I installed it, it didn’t work as it cooked up my list to not showing the action toolbar and i had to re-install WSS to get it back in shape.
After researching a lot others, I decided to give this another trial as it looks to be the one closest to fit my requirements. And right after second trial, it works! Basically this tool enables administrator to control who to view a column and the brilliant thing is we can do this at the group level.