The information given here already is good. The seeds you have listed are what I consider to be more challenging subjects.
Drosera linearis is a temperate species requiring a winter dormancy. As mentioned it;s growing season is short, and to get the requisite growth needed for a return from dormancy the plant needs to be fed. Also, since few leaves are produced within the season, you must also do good housekeeping to remove prey corpses before they mold and affect the health of the thin bladed leaf. It's a high maintenance dew. I had best luck over winter dormancy by freezing the entire plant in a block of ice and keeping it in the freezer over the winter months. Good luck with this, this is a very hard subject!
Drosera peltata ssp foliosa is an Aussie endemic, I never grew this ssp., but assume its requirements to be similar to any other member of the genus. Seed always germinated for me best in the cooler autumn months. Seedlings did well under lights but this genus needs a lot of light to grow typically and does best outdoors like all the tuberous species. Substrate mix should be about 70-30 gritty sand and peat/ Plant goes dormant in the summer heat and needs a mostly dry dormancy. Not too difficult if it responds like regular D. peltata.
D. pauciflora and D. cictiflora seed need a long hot stratification and also sprout in the cooler months. I found these species to be very difficult. They both have similar needs and like D. peltata require a dry summer dormancy.
Drosera felix is a Venezuelan endemic seldom seen in cultivation and similar to Drosera katieurensis, so if you have the true species you are very fortunate. I have never grown this species but it's requirements should be as for any of the Brasillian species: a pristine growing medium, cool roots at all times and a night time drop of at least 5 degrees. From my experiences the Brasillian species were always very prone to fungal attack, so good housekeeping and a really clean mix are important. Pure Chilean LFS is a good medium, or milled live LFS. There is no dormancy in this species.
Aaron May's SundewGrower site has excellent advice on sundew growing in general and is recommended.
Good growing to you!
on the following species:
Linearis
Peltata ssp. Foliosa
Pauciflora
Cistiflora
Felix