I think that there is a mistake at
http://wiki.freeswitch.org/index.php?title=XML_User_Directory_Guide&diff=26382&oldid=26381 revision.
It should be
<action application="bridge" data="user/${user_data(${destination_number}@${domain_name} attr id)}@${domain_name}"/>
and NOT
<action application="bridge" data="user/${user_data(${destination_number}@${domain_name} attr id)}"/>
i.e. with @${domain_name}
freeswitch@internal> user_data 1002@XXX.XXX.XXX.XXX attr id
1002
freeswitch@internal> user_data 1000@XXX.XXX.XXX.XXX attr id
jugatsu
freeswitch@internal>
<user id="jugatsu" number-alias="1000">
<user id="1002">