REST API - owner/name tags specific search to create xml

Hi all!

Is there any rest api link where I can query the owner/name field (name & department) to find only part of the name for example: MyGroups.

...?fields=workitem/workItem/(owner/name=|MyGroup)
I'm looking for something like this, what is found specific data under the tags owner/name field and all work item with these specific names what is contained my search it can be reported in XML. I Interested for any solution.

Thanks.

Bye all!