Views/Account/Index.cshtml is a View, which is only supposed to output information - it can't 'get the needed column' (at least if you're going to follow proper MVC methodology). You would actually need to modify first the AccountIndexViewModel object to have a property for the value you want to display, and then the places that build that object to look up that data and set it on that new parameter. Then you'll have @Model.WhateverYouCalledIt available to output in the .cshtml file.
That will of course require source code to do. If you haven't purchased the source code there are ways around following the proper MVC patterns to output data, but they almost inevitably lead to bad development practices, vulnerabilities, hard to manage code, etc. Learning MVC is the way to go to be able to make modifications properly in v10.
If all that sounds like a bit much, any of our DevNet partners could help with that kind of work.