you can write your own Custom validator here is an example.
public class ProjectNameValidation : ValidationAttribute
{
public ProjectNameValidation()
{
}
//private const string errorMsg = "{0} must at least {1} or not more than {2}";
public override bool IsValid(object value)
{
if (value != null && value !="Test Project")
{
return true;
}
return false;
}
}