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">