Hi,
Use namespaces property to set the path. But it only works with namespaces that you directly creates under /etc/tags
so for example if you want to use or show two namesapces /ets/tags/mycustomtags & /ets/tags/mycustomtags1
then set this property as
namespaces string[] mycustomtags
mycustomtags1
and if you have only want to show one then
namespaces string[] mycustomtags
I hope it will help you.
Also refer http://dev.day.com/docs/en/cq/current/widgets-api/output/CQ.tagging.Ta gInputField.html
Let me know if you need more information.
THanks,
Pawan