Hello Brothers and Sisters,
I found the solution for my task in below article
Automation For Jira - Writing a rule that sends an email with the list of open issues per team in a Roadmap Plan | Automation | Atlassian Support
Generally this automation with lookup and variable works perfectly except the one case.
This is my configuration:


JQL
project=cabr and status="DEPARTMENT HEAD REVIEW."
{{#lookupIssues}}<tr><td><a href="{{url}}">{{key}}</a></td><td><a href="{{url}}">{{summary}}</a></td><td><em>{{issue.customfield_10206.displayName}}</em></td></tr>{{/}}
In my email i need to send a list depends on the ticket STATUS -> it works
Depends on the status i want to show columns with ASSIGNE but for some statuses instead of assignee i wanna display custom field (single user picker) . In my lookup i use below smartvalue
{{issue.customfield_10206.displayName}}
THE PROBLEM. At the end email is sent with correct structured lists of tickets BUT my custom field values are not displayed in the email body...I tired differente syntax i.e
customfield_10206
customField_10206
issue.customfield_10206
etc but it doesnt fix my problem