Get Posts by Tags Querystring Operators

I’m trying to get posts by a specific combination of tags and I’m wondering if the querystring in the #GetPostsbyTags helper can accept operators in some way? For example I have posts with the tag About and some with the tag City but want to only display posts that contain About AND City filtering out any posts that contain only one of the tags. I attempted to achieve this using the {{#checkIf}} method of getting posts by specific tags but nesting the {{#checkIf}} helper doesn’t seem to work such as in the example below…

{{#each @website.contentStructure.tags}}
  {{#checkIf this.name '==' 'About'}}
    {{#checkIf this.name '==' 'City'}}
      {{#each this.posts}}
        {{text}}
      {{/each}}
    {{/checkIf}}
  {{/checkIf}}
{{/each}}

Any help is appreciated!