There is, I've been working with something similar lately myself. If you GET https://<vrahost>/catalog-service/api/consumer/resources you get back a list of all current items. There's some filtration available, and I would imagine owner is one of the parameters (I've personally only filtered on the item name). The programming guide and API reference here should have the info you need to get going.
Here is a vRO action that I use to grab that sort of information. Hope this is helpful in some way.
var service = host.createCatalogClient().getCatalogConsumerResourceService();
var xObj = [];
var userArr = JSON.parse(userList.toLowerCase());
if (userArr instanceof Array != true) {
throw "Expected an array to be parsed. Check input string: " + userList;
}
for each (var user in userArr) {
xObj.push({"userid" : user,"username" : "","machines" : []});
var userIndex = userArr.indexOf(user);
var filter = new Array();
filter[0] = vCACCAFEFilterParam.substringOf("owners/ref", vCACCAFEFilterParam.string(user));
var query = vCACCAFEOdataQuery.query().addFilter(filter);
var items = service.getResourcesList(new vCACCAFEPageOdataRequest(query));
for each (var item in items) {
// System.log("Item: " + item.name + " owned by: " + user);
xObj[userIndex].machines.push(item.name);
}
}
var objOut = JSON.stringify(xObj);
System.log("Return value stringified: ");
System.log(objOut);
This is the call that web is using:
/api/consumer/resources/types/Infrastructure.Machine/?$top=30&$skip=0&$orderby=name asc&$filter=ownersref eq 'user@company.local'
However it is not documented in API documentation. According to api doc, you should use /api/consumer/resources/ address as described here
vRealize Automation 6.2 Documentation Center
User can see his items. Manager/Admin can see VMs owned by his users. User cannot see other users VMs.