On adding Watchers displaying suggested users only from one project

Piotr Koszela_hmhfo5

I have a problem described in this issue:

https://community.atlassian.com/t5/Jira-questions/Assigning-watchers-quot-No-matches-found-quot-unless-username/qaq-p/49683

When one of the users assigning watchers there is "No matches found" unless username typed in full. I found out that the problem can be solved by granting a Broes Users general permission. And here is my problem:

is it possible to see suggested users when typing something in Watchers field but just users from a specific project? (We have separate projects for different companies, a specific user has access just to a one project and he/she should not see users from other projects).