You can specify a filter using the syntax below.
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsdl="http://tews6/wsdl">
<soapenv:Header/>
<soapenv:Body>
<wsdl:FSSDeleteOrganization>
<wsdl:FSSDeleteOrganizationSearch>
<wsdl:Filter index="?">
<wsdl:Field>%ORG_NAME%</wsdl:Field>
<wsdl:Op>EQUALS</wsdl:Op>
<wsdl:Value>MyIDM</wsdl:Value>
</wsdl:Filter>
</wsdl:FSSDeleteOrganizationSearch>
</wsdl:FSSDeleteOrganization>
</soapenv:Body>
</soapenv:Envelope>
Note:
If no filter is specified the default %ORG_NAME% is set to * this cannot be changed.