It would be great if we could use wildcards in the inbox filters.
This way we could filter for example on all invoices where the vendor name begins with "A" (we have users being responsible for a specific letter) or the supplier ID starts with "IC-" (to filter on Intercompany invoices).
This should be available for all fields with a common logic like "" (Asterisk) stands for any character string or "?" for a single character.
It should also take into consideration where the wildcard is used. Like E means value starts with an "E" and any number of following signs, or swiss should filter any value that contains the string "swiss". Perfect solution would be an identifier (like e.g. "@" at the beginnning to differentiate case sensitive / insensitive filter criteria.