from django.contrib.comments.models import Comment
from django.shortcuts import get_object_or_404
from django.conf import settings
from django.contrib import comments

@login_required
def delete_own_comment(request, message_id):
    comment = get_object_or_404(comments.get_model(), pk=message_id,
        site__pk=settings.SITE_ID)
if comment.user == request.user:
    comment.is_removed = True
comment.save()
Разрешение пользователям удалять свои комментарии в Django