[Orgmode] one TODO for multiple projects

[Erik Colson]

Hi,

I'm thinking about moving from planner to org-mode. Particularly for the 
outline and better file formatting.
I've been reading through the doc and I'm missing a feature of planner. In 
planner we can create a todo which can be bound to multiple projects. So if it 
is marked completed in one project it is also in the other projects.

Can this be done in org-mode ?

Thanks
-- 
Erik