Lomandraceae is not recognized as a family in the APG II system; the plants are included in family Asparagaceae or, alternatively, under the segregate family Laxmanniaceae. It can be found in the literature, including at IPNI.
References
Conran, J. G.:Lomandraceae (1998) in Kubitzki, K.(Editor): The Families and Genera of Vascular Plants, Vol.3. Springer-Verlag. Berlin, Germany. ISBN 3-540-64060-6