Force Influence is a technology that can be researched at the Jedi/Sith Temple in Tech Level 4. It costs 325 Nova, and lets Jedi/Sith Masters convert other Jedi/Sith. It is available to the Galactic Empire, Republic, and Royal Naboo.
"Though normally immune to their own abilities, this technology allows Jedi and Sith Masters to convert opposing Jedi or Sith to their cause."
—Manual description