Yes Tvad, you can use both Line Outs at the same time with the Capri. The Bypass Input can be used as a third input for your Transceiver which, in turn from what I understand, can accept additional inputs. So you've got three line level inputs on the Capri ("1" can be converted to phono) and two line level outputs that can be used simultaneously.
You can control the volume of both outputs from the Capri, but they'll both be at the same level. If you want different volumes in different locations, then you'll need at least one remote volume control.
Dave