Hi Jean,
Thanks for your interest in Syncfusion products.
We have support for both logarithmic and multiple y axis. Based on your requirement we have created a simple sample please download the sample from below location.
Sample:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=MoreThan_2YAxis1790733529.zipPlease let us know if it helps.
Regards,
Saravanan