1. /BlogVenv/Lib/site-packages/tagging/templatetags/tagging_tags.py

...

class TagCloudForModelNode(Node):
    def __init__(self, model, context_var, **kwargs):
        self.model = model
        self.context_var = context_var
        self.kwargs = kwargs

    def render(self, context):
        model = apps.get_model(*self.model.split('.'))
        if model is None:
            raise TemplateSyntaxError(
                _('tag_cloud_for_model tag was given an invalid model: %s') %
                self.model)
        self.kwargs["user"] = context["user"]   # 1. add user object
        context[self.context_var] = Tag.objects.cloud_for_model(
            model, **self.kwargs)
        return ''

...

2. /BlogVenv/Lib/site-packages/tagging/models.py

...
from django.db.models import Q    # 2. add Q function
...


    def cloud_for_model(self, model, steps=4, distribution=LOGARITHMIC,
                        filters=None, min_count=None, user=None):    # 3. add user parameter

...

        tags = list(self.usage_for_model(model, counts=True, filters=filters,
                                         min_count=min_count, user=user))    # 4. add user parameter
        return calculate_cloud(tags, steps, distribution)

...

    def usage_for_model(self, model, counts=False, min_count=None,
                        filters=None, user=None):    # 5. add user parameter

...

        if filters is None:
            filters = {}

        queryset = model._default_manager.filter()

        # 6. add authentication related queryset
        if not user.is_superuser:
            queryset = queryset.filter(menu__menu_isEnabled=True).filter(post_isEnabled=True)
            
            if user.is_authenticated:
                queryset = queryset.filter(Q(menu__groups__user=user) | Q(menu__groups__user=None))
                
            else:
                queryset = queryset.filter(menu__groups__user=None)
                    
        for f in filters.items():
            queryset.query.add_filter(f)
        usage = self.usage_for_queryset(queryset, counts, min_count)

        return usage

...