Yes, you can set a maximum number of choices for your Multiple choice fields. In the Form Editor, click on the Multiple choice field in your main view to open its Edit Field panel. Click next to Max no. of choices and type in the number of choices your form visitors can make.
In the Instructions box of the field, you can specify that only a certain number of options can be picked, in order to keep things clear for your form users. After reaching the maximum number allowed, users will receive a warning message if they try to select another option.