Hi Erica!

I'm a freelancer and when i actually want to leave the house and see other people (rarely LOLOLOL) there is Bubble Café at Flon. The service is very nice though it is very expensive (5.30 for a muffin WTF?!) but voila, you can park your buns for a long time and use their wi-fi. It can also get loud with screaming brats during the mommy stroller brigade midday hours. Things to consider for planning  your visit.

Café Grancy sous-gare is a good option too. But not during the busy meal hours as it is unbearably loud. The food is not good though but if you are just having coffee and working/studying it is ok.

There are also several (paid) co-working spaces on and around Avenue de France you can google.

Best of luck!!!

café des avenues at montchoisi in lausanne. pretty calm most of the day, apart from lunch and dinner times. good wifi and normal café prices. they have a living room type space in the rear or you can sit at a table and stare out at the people passing by:-) 

check it out at our saturday morning brunch from 11am every saturday (see glocals lausanne events)

i often work from there as well.

There is a place in Ouchy especially for freelancer, called "Work'n share" as far I remember. It is rue du liseron.

I wanted several times to have a look tehre because it is just meters from my home, never been too :( Though they look active, from time to time I see some events, and the first day is free. Then you can register for a daily or monthly fee.