You can use Tool bar icon to build custom filter or use the option from Home tab as displayed in screen shot below.
Process Runner offers various filter options including filtering based on Excel cell or range.
Please review installed sample "BSEG-Accounting Document extract for listed accounts only.ite" under Data Extractor folder for an example.
Click here for more details regarding Data Filters.
Click here to know the description of different Source Types available in Data filter builder.