FetchXml query to list all Owner Teams where Current/LoggedIn user is a member.

fetchXml-CurrentUserTeams.xml

<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="true">
  <entity name="team">
    <attribute name="name" />
    <attribute name="teamid" />
    <filter type="and">
      <condition attribute="teamtype" operator="ne" value="1" />
    </filter>
    <link-entity name="teammembership" from="teamid" to="teamid" visible="false" intersect="true">
      <link-entity name="systemuser" from="systemuserid" to="systemuserid" alias="ae">
        <filter type="and">
           <condition attribute="systemuserid" operator="eq-userid"/>
        </filter>
      </link-entity>
    </link-entity>
  </entity>
</fetch>