Session State MVC3

I'm not clear what exactly are you trying to achieve.

If you want to limit users access exclusively to the data that belongs to them, you need to have this data related their IDs in Users table. There is very little that you have told about table structure, but I think it is safe to assume that you have Courses table and something like UsersInCourses that would map many users to a single Course. All you would have to do is to select courses have User's Id assigned to them. To get currently logged in user you just have refer to

User.Identity.Name

in your application's code.

So let's assume your class is cooking reciepe :

public class Recipe
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Author { get; set; }
    public string PreparationInstructions { get; set; }
    public DateTime CreationDate { get; set; }
}

and you want to have an Action that returns recipes for currently logged in user

    public ActionResult ShowMyRecipes()
    {
        var myRecipes = dbContext.Recipes.Where(recipe => recipe.Author.Equals(User.Identity.Name)).ToList();
        return View(myRecipes);
    }


    public ActionResult CreateRecipe(Recipe recipe)
    {
        // set Author to curently logged in user's key
        recipe.Author = Membership.GetUser().ProviderUserKey;
        // save changes
        dbContext.Recipes.Add(recipe);
    }