randomization of particpant group

Hello everyone. I am planing to conduct a priming experiment with three conditions. Each condition involves looking at a certain set of photographs and rating them, then answering a questionnaire.

I have established participant groups based on what set of photos participants will view. Instructions for each set are in distinct blocks as are the photos which are placed in separate stimuli lists.

My question: is there anyway to have superlab randomly assign which participant group a participant will be in?

There is no way to have SuperLab randomly assign which participant group a participant will be in.