Sorting text messages by contact group

[roadkill595]

Hello, My girlfriend is currently running her business from her personal phone. She's basically texting clients a lot through the day. I have her clients setup as a different group in her contacts but is there any way to brows text message history by contact group? Everything I've seen so far concerns sending messages to groups, instead of sorting received messages by group. Being able to browse certain groups would make separating personal and business texts so much easier. Thanks!