You can see the new markup under the jobLocation section of the schema, it looks like this:
Aaron Bradely spotted this and posted it on Google+. He wrote:
Google made a change to its Job Posting guidelines page (http://bit.ly/2DPO144) that allows job posting publishers to explicitly state that a job can be performed remotely.
Previously Google specified that remote-eligible jobs simply omit all information about a job’s location excepting what country in which the job was “available”.
Forum discussion at Google+.