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In western monasteries isn't not uncommon for monks to use computers to teach the dhamma online or write books. However, a monk wont own the computer, you'll be giving the computer to the sangha.
You shouldn't have to worry about whether a pen or a computer is more of a distraction, the monk should be able to handle his own mind and distraction. If he knows that a computer is too distracting for himself then he will use a pen.
As for the Vinaya, you may want to search for terms "piracy" and "p**nography" in Thannisaro Bhikkhu's book The Buddhist Monastic code I.
Piracy isn't against the vinaya but if a monk wanted to avoid piracy then unintentional stealing is not against the Vinaya. Accidentally seeing p**nography isn't against the Vinaya but staring lustfully at a woman's parts (without intending on emitting s*m*n) earns the lowest punishment- a dukhata.
Upvote:1
[Note: This is/was a gift of Dhamma and not meant for commercial purpose or other low wordily gains by means of trade and exchange.]