It is not, Jira does not have field-level security or permissions.
You could move the field edit into the workflow (so that people can only change the content of fields during a transition, and you can protect transitions with conditions like "must be in group"), but that can make your workflow messy and it's not obvious to users unless you're very careful with the transition names.
👋 Hi there Jira Community! A few months ago we shared with you plans around renaming epics in your company-managed projects. As part of these changes, we highlighted upcoming changes to epics on...
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