How to use CSOM to get a list of projects based on a custom field value?

Using the client object model, how do you load a list of projects filtered by a custom field value? For example, the following loads projects based on the project name and whether or not the project is an enterprise project:

var pubProjects = projContext.LoadQuery(projContext.Projects
    .Where(p => p.IsEnterpriseProject == true&& p.Name == projName));

Is it possible to do something like:

 var pubProjects = projContext.LoadQuery(projContext.Projects
     .Where(p => p.MyCustomField== "abc"
     ));

Mike G.