I don't know if there is a "hiden" way of doing this..
but it would be very usefull filtering reports by supplier and project in order to have the info grouped by an very usable way.

Is very frequent to have the need of reporting by project to a certain customer or supplier.

It could be done in the references listing for projects (project/references) ading the headers text boxes search capability already used in dolibarr.

It also could be done in supplier´s invoice listing (financial/suppliers/invoices) by adding a field and header with text box for search by project and supplier in that listing or repport.

Finally I think it could be more clean in "reporting side menu" add this filtering capability (by project, by supplier, and by customer account and project and combinations of these)
In this case you could print a repport of account state, for a any customer or supplier for a any particular project, and have all specific info available to make decisions about payment previsions

This would be very very usefull, at least for us.
Many thanks in advance
Regards
Alejandro

Dear Alejandro,

Could you find any helpful information in filtering reports as u specified. I want to generate reports like, by source, by customer, by employee..

Thanks in advance,
Bineesh

Not yet... but it's possible to filter by different criterias using some external mysql manager like myadmin (having some skill of course)