{{#get "posts" filter="tag:news" as |news_post|}}
{{#foreach news_post}}
{{title}}
{{/foreach}}
{{/get}}
{{#get "posts" filter="tag:news" as |news_post|}}
{{#foreach news_post}}
{{title}}
{{/foreach}}
{{/get}}
By your question I suggest you want to base it on some that within your .. post perhaps ? You can use it within the {{post}}
by using the {{tags.[0].slug}}
{{#get "posts" filter="tag:{{tags.[0].slug}}" include="tags" as |news_post|}}
{{#foreach news_post}}
- {{title}} - {{tags.[0].slug}}<br>
{{/foreach}}
{{/get}}