If you Shift+Left Click on a conduit with a wrench, you get more info on that conduit/network. For a power conduit, you see the I/O of that conduit (like the EU reader from IC2). For a liquid conduit, you can see if the network has a liquid filter (i.e. if you've restricted it to only allow one liquid), as well as what liquid is actually flowing through that specific conduit. Personally I find that a lot of liquids look far too similar to each other while flowing through conduits (I'm looking at you honey, seed oil, and creosote), so this would make it more obvious.
Liquid Conduit Filter Display
When you apply a filter to a liquid conduit by double clicking it with a full bucket, make it so that the little bucket icon on the conduit itself fills with that liquid, so you can see at a glance without having to check with the wrench. It would be cool if you could apply the filter using any liquid container (tin cans, cells, buckets, wax capsules whatever), but that might be a little tricky. You could probably sort something out by using the liquid dictionary but IDK, I'm new to coding.
I hope you like my ideas!