welcome to the community.
An out of the box solution would be to have a look at Jira Service Management to have a full fledged solution, alternatively there are also 3party apps available like https://marketplace.atlassian.com/apps/1212224/helpdesk-for-jira-customer-portal-sla?hosting=datacenter&tab=overview
Generally speaking if you are willing to grant the users access to your jira instance (which does consume licenses) you could set up a new project (and these users will only get access to this one) and adjust your create/view screens accordingly.
Hope that helps
All the best
(Or, What to expect when you’re expanding.) Once you've completed your Jumpstart, or your initial assessment of Jira Align, you'll start to think about how you can roll it out to the rest of your e...
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