I e-mailed Dan from Empress about this very issue and here's what he said:
"The 110mA rating is it's maximum power consumption. It will vary depending on how you're using it... Also if you're using a VoodooLabs pedal power 2 plus, then you're ok to use the 100mA outputs because they actually output about 110mA... If you have another power supply, go ahead and try the Multidrive on the 100mA output. Most likely it will be fine. There's no danger of damaging the pedal by underpowering, so worst case would be to just move it back to a higher current output."
Sting Ray 5 & Hohner B-Bass VI
Darkglass #32 | PBBBC #14 | Eventide #1 | S.A.S.S. #153 | Empress #1