Good question. But considering that a vote is more likely to matter under a PLPR system, I would assume it does. The system doesn't grant people more votes or less votes for that matter.
To summarise quickly: In district 1, parties A, B, C and D run. Each party has a list of candidates in order. Each voter can vote for a party or a candidate. If they vote for a candidate, they technically also vote for that party. If they vote for a party, they also vote for the next candidate on the party's list to need their vote.
District 1 has 4 seats. Party A gets two seats, party B and C gets one seat, respectively and D gets no seats. The remaining votes from this district (for each party) is used on the national level.
The national level has an additional 30 seats, here party D obtains 4 seats, despite not winning any district seats.
As an example of how FPTP is actually working against the one man, one vote principle, consider the last UK general election in 2015:
Every vote cast in a constituency for a candidate that did not win in that constituency is lost. That's about 50% of the votes. But also, every excess vote cast for the candidate that won (e.g. if the next candidate got 5000 votes, and the winning got 6000 votes, that's 999 excess votes) are also lost. And that accounted for about 25% of the votes.
In total, about 75% of votes in a UK general election are pointless.
As an aside; I'll grant that effectively, each vote is counted in the UK, it's just that a lot of them end up having no influence at all. So I guess, it's more a philosophical question about what we mean with 'one man, one vote'. Are we being literal or are we being meaningful?