The paradigm of network-centric warfare is a powerful concept to employ the opportunities of modern IT systems. Its aim is to improve military effectiveness by achieving information supe-riority. In principle, every system or person can communicate with everybody else in the net-work, where all the information available is shared among the different users. However, this potentially unlimited amount of information has to be restricted to mission-relevant information in order to achieve a relevant operational picture. Security regulations and tactical C4ISR systems impose further restriction, due to restricted access to classified information, as well as limitations of bandwidth and local storage in mobile devices. Basis, combinable filters are developed to maintain security regulations and support the users of the (tactical) C4ISR system in selecting the appropriate mission-relevant information. 1.