This plugin looks about right, free too. Right now you can't be specific (their roadmap says they should allow group seletion at some point) but if the users dont have "Can work on Issue" permissions they can't see the work logged.
You are very welcome. :)
For the follow up, I suppose I would leave that to the notification scheme. Seems most simple. Ensure that the Customer User isn't in the various time-logging related events:
I would think.
Hey Atlassian Community! Today we are launching a bunch of customer stories about the amazing work teams, like Dropbox and Twilio, are doing with Jira. You can check out the stories here. The thi...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG