Adding a field from custom expense form to a project report

I have a project level report that I am wanting to add a 'vendor' field to. This vendor field is captured in an expense custom form. Is there a way through text mode to add that to a project level report? The other issue is that there may be multiple vendors for a project but we would want to only display the first or concatenate the multiple ones into one field. Is that possible?

Thanks

Heather