The Individual Buffer can be used to make up for differences in latency introduced by differences in distance between bandmates.
If there is noticeable latency on a particular bandmate, that can be compensated for by adding a slight bit of latency on the other bandmates. In this way, you decrease the difference in latency between bandmates and the overall latency will become less noticeable.
1) Click the Settings icon in the top right corner and check the Show Advanced Settings box
2). Check the Enable Manual Buffer box
3) You can now enter a buffer value for each bandmate in the mixer.
Please note that the Individual Buffer values will not be saved between sessions.