Show only the author's posts in Relationship Custom Field

I created a Relationship Custom Field in Custom Field Suite, where the users can see and select a post from another custom post type (for eg. products). The problem is that I have a thousands of posts and for the users it’s a bad experience to search dozens of items until finding their posts.

Is there any solution that users should be able to see only the items created by them?

Many, many thanks in advance!

Regards,
Burebista

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