I think the crux of this questions comes down to one's emotional and physical control, i.e. poker face. If we start adding in things like motive and intent, we start the psychoanalysis process and get into psychopathology and such.
I think I am physically capable of effectively telling a lie and using it to manipulate people, but I am not the type of person who would choose or desire to do so. So in that case, I could be a good liar, but I tend to not be.