Hi,
If the people are members of the same Hunt Group or ACD Group, then the Hunt Group and ACD Group related reports in the CDR application may work. They should show you only the calls pertaining to that group.
Alternatively, custom reports may be created using the Crystal Reports software.
Finally, any software can be used to interpret the VCX CDR data. The software just needs to be able to retrieve the files using SFTP and understand the XML file format. The XML tags in the data are documented in the VCX Maintenance Guide in the Understanding CDR Fields section.