Using Skype on iMac

Why I love Skype:

Everyone uses Skype,
Skype has a very clear audio,
Skype is free for audio calls,
I love Skype.

Skype has only a single problem, if this problem is fixed then Skype will be even better to say the least.

Problem:

When in a conference call with my buddies playing some video games, I want the ability to be able to change the audio of each person in that call. I only need the audio change to effect me not for everyone.

Example:

If I am using Skype with a few of my pals, but one of my friends starts being toxic or otherwise loud, I want to be able to mute that person or lower the volume for only that one person.

Can anyone think of a reason why Skype doesn't have this feature when I've been told other companies like Skype allow this?