Is it permissible for a programmer to produce educational programs for his private use that are similar to programs he produces in his original work, but in a different way?

The production of special educational programs is subject to the following conditions: that they are free of prohibited elements such as music and images of women, that materials, programs, and devices from your original work are not used, that the private work is conducted outside official working hours, and that you do not usurp your company's clients to market your own programs to them.