log...
We could try and hack the solution to work. But yes it assumes there is one dashboard per wiki.
Using the "||" is the transclude results in the same dashboard, rather than building a new one on the current tiddler.
{{||$:/plugins/nico/pm/ui/Dashboard}}
However I think what is intended is rather than multiple independent dashboards, you use the project's to divide the work into "separate" project dashboards.
This has the added advantage that no matter how many projects you have you can see all tasks in the one dashboard view. so you don't loose them.
The instructions note;
Yes, any todo (or tiddler, for that matter) can be used as a project using the <<project>> macro. This means that you can effectively make any todo a sub-project of another project, and go as deep as you wish!
So for your case I would make the first level projects equal to the different dashboards you want.
In many todo systems the top level projects would be domains;
eg personal work sport finance in which you will have specific projects.
Each of these can be considered a "domain" dashboard.
Regards
TW Tones