No. Most members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) who have participated in temple ceremonies know and understand the difference between their ceremonies and those of the Masons. Only one Mormon temple ceremony bears similarity to one Masonic ritual - they follow a similar pattern and that is all. The overall lesson and covenants made are completely different, as are most of the symbols. Many Mormons are Masons and can attest that the ceremonies are not the same.
Other Mormons are not concerned simply because they don't care.
Another answer:
The temple rituals are ancient, and follow a pattern set forth in the Old Testament. That the Masons can read the Old Testament means only that the pattern is made sufficiently clear to those who know scripture.
There is also evidence that forms of ancient temple worship were passed on from father to son, and through priestly guilds, since ancient times, and that that the predecessors to Masons may have been privy to that knowledge. N.b. that many of the mysteries of Godliness are kept close by believers to prevent them being trampled by unbelievers. (Luke 2:19, Deut. 29:29, Ps. 25:14, Prov. 3:32, Job 29:4, Judg. 13:18, Dan. 2:19, Dan. 2:28, Amos 3:7, Matt. 13:11, Matt. 13:35, Rom. 16:25-27, 1 Cor. 14:2, and lots more)
Any similarity between Masonic ritual, Mormon ritual, and Old Testament ritual comes, in Mormon belief, from the same source: God.
No. There are a few similarities between the temple ceremonies of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) and the Masonic rites, but the Mormons didn't get the temple ceremonies from the Masons. Mormons believe that Joseph Smith wrote the temple ceremonies through revelation from God. If you don't believe that, but believe Joseph Smith made it up, you have to admit that the Temple ceremonies are only vaguely similar to the Masonic ones, and therefore he didn't just steal the Masonic rites and make them his own. While there are a few similarities in certain details, the main theme of the Mormon rites is quite different than the theme of the Masonic rites.
Coeur d'Alene Masonic Temple was created in 1909.
Masonic Temple Building-Temple Theater was created in 1927.
Burlington Masonic Temple was created in 1897.
Lowville Masonic Temple was created in 1928.
Russellville Masonic Temple was created in 1926.
Sacramento Masonic Temple was created in 1920.
Sparta Masonic Temple was created in 1923.
Kilbourn Masonic Temple was created in 1911.
Wheatland Masonic Temple was created in 1898.
Detroit Masonic Temple was created in 1922.
Watertown Masonic Temple was created in 1914.
Mobridge Masonic Temple was created in 1923.