I have extened UserGroup with new type of granular permission: Region. Region - it is just a external system id. I add to some document types propery: Region. I need to override content node searching logic. With additional permission by region if user in user group and this user group has region A and content in content tree has region A, then we should be able to find this content. It should be like persmissions by document node, but it should check property region. I use umbraco 15.1.1. Is there a possibility to add this custom permission?