This was asked about in the developer's section, the end of this post describes a command to create an hourly restriction: https://support.rainmachine.com/hc/en-us/community/posts/245410587-How-to-temporarily-pause-resume-a-running-program.

However, the method described falls well short of a needed "pause" feature.  I would like to see a pause that suspends the current program for n minutes.  When the time is reached, the timer would expire/erase and those n minutes would be added to the back of the current zone.  The rest of the program would continue as usual.

The method described in the linked post simply inserts an hourly restriction.  If you already have a restriction defined, it is added on top of it which becomes permanent unless manually deleted.