What do you mean by a "collaborator" ?
JIRA has assignees and watchers. You can use currentAssignee or watcher JQL filter functions.
See for example this helpful tutorial: http://sterlinghamilton.com/5-useful-jira-custom-filters/
Hope that helps,
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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