You can decide, if you want to limit edit-permission in Confluence based on a multi-user picker field in Jira. Lets say you create a multi user field named "page editors" and you put this field in one of your projects, where STAGIL Workflows and Field for Confluence is enabled. With this field you can manage edit-permissions of connected Confluence pages with the following logic:
if "page editors"-field is empty → connected page is editable
if "page editors"-field is not empty and contains current user → connected page is editable
if "page editors"-field is not empty and does not contain current user → connected page is not editable
To select a customfield for restriction, please make sure that multi user picker field exists and is placed in the correct screens. Then select field in the Configuration section of the app: