This plugin might helps: https://marketplace.atlassian.com/plugins/com.onresolve.jira.plugin.Behaviours
Note: Behaviours plugin is now included in scriptrunner plugin
The other option is the "Field Security" addon from quisapps. The bit I'd like to point out is that "Jira does not do field level security natively - you need coding or an addon to provide it"
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