I got a tor client using on mashine in my local network, so I capture all traffic. Also I can redirect all tor traffic on any server/client, add some clients in network, modify or inject every packet from this mashine.
So, is there way to decrypt this tor traffic or just see requested resources?
One of the ways to see requested resources is DNS-sniffing. If client isn't encapsulate DNS-requests traffic into tor network and requested only internet (not tor internal) resources you can capture network packets between client and DNS-server.