an alternative approach could be to craft a JQL query/filter, like Artur already mentioned, and then subscribe the interested parties to the search results.
This can be done by stock functionality "Filter Subscription" and is further explained here:
Also this blog post I found very helpful:
Apart from that all from Marketplace there are Apps available which are capable of catering that need more specifically - it depends on how high expectations are and what additional features this option might need to have from a users view.
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