The rule is that you should probably avoid exiting about your place of work, and that if you do then you should be transparant about it.

Most IP edits are good edits (most edits to WP are from IPs and they do most ofthe good edits) but there are some examples of people making unsuitable edits from their workplace.

Here's a notable example: http://www.independent.co.uk/news/uk/home-news/government-wi...