Thanks, now I found the remote adverts page, but it is not working 100%.
At first, when opening the page there are general listings of the site at preview. After selecting a category there is no preview. I had also checked the code at a blog and personal remote adverts are not shown, with the code generated from admin it is working very well.
If I want to show all listings from an owner, what setting do they need? Only category "-any-"?