Django Admin SelectMultiple Widget

In my model I have many to many relationship between 2 tables Users and Groups. In the admin interface I see the SelectMultiple widget for Groups. Actually, I am using filter_horizontal, I see the available groups and the selected groups in 2 separate lists. Is it possible to filter the list of available groups that I can see (based on some criteria). I do not want to show all the groups in the groups table. Thank you

From stackoverflow

• In your form class, you can specify a custom queryset for the group-field, which then determines which Group-instances are available in the form:

  class UserForm(forms.ModelForm):
      # override the default groups field
      groups = forms.ModelMultipleChoiceField(
          queryset=Groups.objects.filter(YOUR_CONDITIONS),
          widget=forms.SelectMultiple,
      )
  
      class Meta:
          model = User
  

• How do I change the group widget that I see in the admin