The person behind Winkie's diner= Diane's Jungian Shadow?

Is the mud or shit covered person ( homeless wench) behind the Winkie's diner in 'Mulholland Drive' that terrifies the dreaming man, Diane Selwyn's Jungian Shadow?

Who do you think Diane dreams the person behind Winkie's to be? Her own evil ugliness made flesh , holding the blue box, evidence of the evil deed of putting a hit on Camilla Rhodes?