Currently, Switzerland has the status of a third country not associated to Horizon Europe in the frame of the DN and PF calls.
For PF: As long as this status remains unchanged, researchers with a Swiss host institution are not eligible to apply to the MSCA Postdoctoral Fellowships. Switzerland is eligible as host country for the outgoing phase of a Global Fellowship. However, Swiss nationals are NOT eligible for participation in MSCA Global Fellowships unless they are long-term residents of an EU Member State or a country associated to Horizon Europe.
For DN: Organisations based in Switzerland can participate in MSCA Doctoral Networks as ‘Associated Partners’. The Swiss project partner will not be funded by the European Commission but by the State Secretariat for Education, Research and Innovation.
More info can be found at https://www.euresearch.ch/en/horizon-europe/excellent-science/marie-skodowska-curie-actions-(msca)-55.html