[2] Lemon is known for her television soap opera roles including Zelda Baker in The Young Doctors, Marlene "Rabbit" Warren in Prisoner and Brenda Riley in Neighbours.

[1] Lemon joined "The Rock Players" an amateur theatre company in the inner-city Sydney suburb of Leichhardt and after appeared in a production of the musical Steaming before attending and graduating the University of New South Wales in 1982.

[10] In the same years she appeared in several theatre productions, including Summer Rain by Rodney Fisher, critical acclaimed The Venetian Twins by John Bell,[11] and The Girl Who Save Everything by Robyn Nevin.

[13] After stage acting in Aubrey Mellor's Brilliant Lies and Rodney Fisher's And a Nightingale Sang, Lemon returned to film in the movie Billy's Holiday in 1995.

[17] Over the next two years, she appeared in numerous theatre productions, including Taming of the Shrew by Glen Elston, Daylight Saving by Nick Enright, and in The Milemonum Project written and devised by Lemon and Russell Dykstra.

[18][19] From 1999 to 2005 Lemon became an integral part of the casts of Sydney Theatre Company productions, appearing in the musical Piaf by Adam Coo, Morning Sacrifice by Jennifer Flowers, The Republic of Myopia by Jonathan Biggins,[20] Summer Rain by Robyn Nevin,[21] and My Brilliant Divorce by Gary Down.

[23][24] In 2006, after starring in Paul Goldman's film Suburban Mayhem,[25] Lemon was played as Shirley in Stephan Elliott and Allan Scott's critical acclaimed musical Priscilla, Queen of the Desert, touring between 2006 and 2008 the major theatres of Australia and New Zealand.

[32] In 2013 Lemon came back to television acting as Bunny in Jane Campion's mini-series Top of the Lake,[33] winning the Equity Ensemble as a cast member.

[35] In 2014 Lemon played Dotty Otley in Jonathan Biggins's Noises Off production at the Sydney Opera House,[36] She was also cast for season three of television series Rake,[37] and Australian mini-series The Secret River.