Hi @srijaposhala,
Hope you are doing well.
Proposed Solution
As a solution, you just need to check that login user should be a part of caller of any incident and need to add this code "current.caller_id==gs.getUserID()" in the "Condition" Field of an UI Action named as "Reopen Incident". The "Reopen Incident" UI Action will now be visible to those users who are a part of Incident as a Caller. I personally tried it on my Personal Developer Instance to provide the effective solution as soon as possible.
If you find this information/knowledge/solution helpful, please don't forget to mark my solution and reply as helpful and accepted.
Thanks :)
Aakash Garg
ServiceNow Developer
