List users privileges for whole cluster/all databases in the cluster

Hi,



I try to find out some view, select or something what show me the privileges
for the user across the whole postgresql cluster. The username/user is 
global for whole cluster not individual database, so I would like to know 
the privileges for the user in all databases in the cluster using one view, 
select.
I know how to list user's privileges in the individual database, but for all
databases...




Thanks for the advice.

 Jana