{{comment.user}} # which provides User, not my CustomUser

{{comment.user.CustomProperty}} #does not work.

{{ comment.user.customeruser }}

{{ comment.user.customeruser.customproperty }}

class IRCUser(models.Model):
    user        = models.ForeignKey(User, unique=True)
    name        = models.CharField(max_length=100, blank= True, null = True )
    friends     = models.ManyToManyField("IRCUser", blank= True, null = True)
    dataRecieved= models.BooleanField(default=False)

>>> IRCUser(user = User.objects.get(username='Kermit')).save()

class CustomUser(User):
    irc_username = models.CharField(blank=True, null=True)
    irc_password = models.PasswordField(blank=True, null=True)
    msn_username = models.CharField(blank=True, null=True)
    msn_password = models.PasswordField(blank=True, null=True)
    fb_username = models.CharField(blank=True, null=True)
    fb_password = models.PasswordField(blank=True, null=True)
    gt_username = models.CharField(blank=True, null=True)
    gt_password = models.PasswordField(blank=True, null=True)
    ....
    ....

class IRCProfile(models.Model):
    user = models.ForeignKey(User, unique=True, related_name='ircprofile')
    username = models.CharField()
    password = models.PasswordField()

class MSNProfile(models.Model):
    user = models.ForeignKey(User, unique=True, related_name='msnprofile')
    username = models.CharField()
    password = models.PasswordField()

class FBProfile(models.Model):
    user = models.ForeignKey(User, unique=True, related_name='fbprofile')
    username = models.CharField()
    password = models.PasswordField()