LTC program is the instrument to control Active Directory. It is consistent realization of the network control principles that are stated here. Nowadays LTC provides facilities for controlling sets that have no analogues worldwide. The program common paradigm is the thesis “Many objects – one operation”. Essential benefits were obtained due to integration of search areas and filters within united operational space. Based on such mechanism of creating sets, LTC in a natural way gives the possibility to restate majority of problems that are facing administrators of network directory as a series of typical operations upon such sets. In terms of operations on objects sets (but not on separate objects as in standard tools) the following base components are implemented: