Capture One Curves?

Hi!
Let me ask You a question, some old forums topics says, It is possible to make own curves for Capture One,
changing a bit characteristics. It was even editor for It, but now i Cannot find It.
Some other folks says, that Capture One adjust 1.8 gamma into a Linear Curve.
Is possible to get true Linear Curve? Or Linear is linear? Of course without ICC, that apply It's own Gamma.
Are Capture One curves the same what I can do with curves adjustment, or they do a different thing?
Thanks! Karl