The 11th house represents friends, like-minded people, dreams, hopes and ideals, projects and plans for the future. As we understand, Saturn and dreams are two opposite poles. Such a person does not like unexpected surprises. For them, this can be a source of stress. Therefore, it is important for them to cushion themselves, just in case.
A person with Saturn in the 11th house is a conservative, for whom organization, reliability, and discipline are important. A pragmatist. Therefore, a person with such Saturn, if they dream at all, dreams of something concrete, understandable and real. They are afraid of change. They need to see this world in the most precise, concrete way, having planned each of their next steps for the near future. They will not make plans for the distant future, perfectly understanding that the future is shaky and everything can change. Therefore, they build their projects and plans not with broad strokes, but in a structured and phased manner.
If in a person's chart, Saturn is in a tense aspect, they may see the future in dark colors. It will scare them.
Friends are usually few, and these are reliable and time-tested people. But we must understand that every person's chart is individual, and the 11th house itself can be filled with other planets: there may be Jupiter, which, on the contrary, indicates large collectives and many friends. Or there may be luminaries, and this will describe a completely different picture, so we always pay attention to the indicators. And if a person really has many friends, then a person with Saturn in the 11th house will try to control this space, organize it, distributing some duties and rules among friends.
Relationships with the father may be either ideological or detached. Possibly an idealization of the father.