Some members of a popular Facebook group for Canberra mums have been left shocked after finding out the community, which specifically states it's only for women, has been administered by a Sydney-based man who runs a digital media company. An expert says it's a "grey area" because while it's not a problem for businesses to run such groups, members need to know exactly what they're signing up for. Two Canberra mums have started their own local Facebook group which they hope to keep as a supportive, safe space for locals.