If you want to use PowerShell to load specific values with lambda expressions and the SharePoint CSOM API, the code you have to write is ugly. Fortunately, Gary has packaged it in a function that handles all the ugly details for you.
Read the article at: http://www.itunity.com/article/loading-specific-values-lambda-expressions-sharepoint-csom-api-windows-powershell-1249.
Tags ITUnity, PowerShell, SharePoint Online