Hi Ana,
Sure it is possible, but it will depend on the test runner you are using with Specflow(NUnit, MSTest, Specflow+ Runner, ConsoleUnitTestRunner, and so on). Check your App.config file, and search for the "unitTestProvider" key.
Then you will need to configure your Jenkins job to call the test runner using the correct parameters. For example, if you are using NUnit you can use something like this, you can use a batch command:
nunit-console myassembly.dll
/include:Smoke
It would be easier to help if you could tell us what do you have right now. Do you already have your Jenkins job configured? Can you run all your tests in Jenkins?
Regards,
André