Redirect user to different page based on logged in user in ASP.Net

Example if three different companies are using same login page but i want when company A login they will be directed to page A, When company B login they will be redirected to page B same goes with company C

This is my login page

    protected void ValidateUser(object sender, EventArgs e)
    {
        int UserID = 5;
        string constr = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand("Validate_User"))
            {
                using (SqlDataAdapter sda = new SqlDataAdapter())
                {
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.AddWithValue("@Email", LoginINNOVATION.UserName);
                    cmd.Parameters.AddWithValue("@UserName", LoginINNOVATION.UserName);
                    cmd.Parameters.AddWithValue("@Password", LoginINNOVATION.Password);
                    cmd.Connection = con;
                    con.Open();
                    UserID = Convert.ToInt32(cmd.ExecuteScalar());
                    con.Close();
                }
                switch (UserID)
                {
                    case -1:
                        // Login1.FailureText = "Username or password not correct.";
                        break;
                    case -2:
                        LoginINNOVATION.FailureText = "Account has not been activated.";
                        break;
                    case -3:
                        LoginINNOVATION.FailureText = "Your Password.";
                        break;
                    default:
                        FormsAuthentication.RedirectFromLoginPage(LoginINNOVATION.UserName, LoginINNOVATION.RememberMeSet);
                        break;
                }
            }
        }
    }