Saving comments not with PostID but different unique identifier

Saving comments not with PostID but different unique identifier

so here is the deal: I want comments to be saved not with the post ID but with another unique identifier.
With disqus there is a way to do this with javascript:
/* * * CONFIGURATION VARIABLES: THIS CODE IS ONLY AN EXAMPLE * * */
var disqus_shortname = 'example'; // Required - Replace example with your forum shortname
var disqus_identifier = 'a unique identifier for each page where Disqus is present';
var disqus_title = 'a unique title for each page where Disqus is present';
var disqus_url = 'a unique URL for each page where Disqus is present';
Is there any way to create wordpress comments NOT associated with the postID? Can I somehow define another unique identifier?